| Fourth-down player, often | 25 |
| Fourth-down plays, often | 24 |
| Fourth-down specialist | 22 |
| Fourth-from-the-sun planet | 26 |
| Fourth-generation relative | 26 |
| Fourth-largest asteroid | 23 |
| Fourth-largest Great Lake | 25 |
| Fourth-largest inland sea | 25 |
| Fourth-largest moon of Uranus | 29 |
| Fourth-quarter strategies | 25 |
| Fourth-to-last Greek letter | 27 |
| Fourth-yr. college students | 27 |
| Fourth-yr. high-schoolers | 25 |
| Fowl less fancy than her mate | 29 |
| Fowl of children's story | 28 |
| Fowl often served au vin | 24 |
| Fowl with a showy mate | 22 |
| Fowl with three nephews | 23 |
| Fowl's resting place | 24 |
| Fox and Coyote, for two | 23 |
| Fox and others, informally | 26 |
| Fox and Rabbit of literature | 28 |
| Fox and Sauk Indian leader | 26 |
| Fox and turkey followers | 24 |
| Fox Business Network program | 28 |
| Fox Business Network show | 25 |
| Fox comedy with Jane Lynch | 26 |
| Fox drama since May, 2009 | 25 |
| Fox favorite, for short | 23 |
| Fox franchise, familiarly | 25 |
| Fox hunter's cry (Var.) | 27 |
| Fox hunter's outfit | 23 |
| Fox hunter's shout | 22 |
| Fox hunters' halloo | 23 |
| Fox in a 1973 Disney film | 25 |
| Fox in a henhouse e.g. | 23 |
| Fox Mulder's informant | 26 |
| Fox Mulder's obsession | 26 |
| Fox News analyst, often | 23 |
| Fox News anchor Pemmaraju | 25 |
| Fox News contributor Karl | 25 |
| Fox News president Roger | 24 |
| Fox News pundit Hannity | 23 |
| Fox of "CSI" | 22 |
| Fox of southern Africa | 22 |
| Fox or Bear appellation | 23 |
| Fox or Rabbit honorific | 23 |
| Fox or Rabbit, to Uncle Remus | 29 |
| Fox or turkey attachment | 24 |
| Fox or turkey follower | 22 |
| Fox premiere of August 2003 | 27 |
| Fox reality show, popularly | 27 |
| Fox reality TV series of 2004 | 29 |
| Fox series set in California | 28 |
| Fox show about New Directions | 29 |
| Fox show, in headlines | 22 |
| Fox sitcom '-- Death' | 29 |
| Fox Sports alternative | 22 |
| Fox Sports talking head | 23 |
| Fox Sports's home portal | 28 |
| Fox talent contest, to fans | 27 |
| Fox talent show, for short | 26 |
| Fox terrier of film fame | 24 |
| Fox with a dark brown mane | 26 |
| Fox ___ (ballroom dance) | 24 |
| Fox-and-hounds activity | 23 |
| Foxboro pros, for short | 23 |
| Foxboro team, for short | 23 |
| Foxes used to be seen here | 26 |
| Foxes' neighbors, once | 26 |
| Foxhole headgear, slangily | 26 |
| Foxtrot on a Russian plain | 26 |
| Foxx who played a junkman | 25 |
| Foxx who played Sanford | 23 |
| Foxy Lettuce stock ___ | 22 |
| Foy with seven little ones | 26 |
| Fozzie's frog friend | 24 |
| Fr. governess's address | 27 |
| Fr. holy women (Abbr.) | 22 |
| Fr. ladies with haloes | 22 |
| Fr. place name starter | 22 |
| Fr. rebels in the 1960's | 28 |
| Fr. rebels in the 60's | 26 |
| Fr. women's titles | 22 |
| Fr., Ger., Ital. et al. | 23 |
| Fraction equal to .125 | 22 |
| Fraction of a football squad? | 29 |
| Fraction of a fraction | 22 |
| Fraction of a kilocycle | 23 |
| Fraction of a minute: Abbr. | 27 |
| Fraction of a moment: Abbr. | 27 |
| Fraction of a pound, once | 25 |
| Fraction of a square mile | 25 |
| Fraction of a tick: Abbr. | 25 |
| Fraction of a viewpoint? | 24 |
| Fraction of a watt-hour | 23 |
| Fraction of an atmosphere | 25 |
| Fraction of an instant: Abbr. | 29 |
| Fraction of una semana | 22 |
| Fraction-addition calc. | 23 |