| It feeds chiefly on plankton | 28 |
| It feeds Niagara Falls | 22 |
| It fell after about 15 years | 28 |
| It fell from the sky in 2001 | 28 |
| It fell in the Old Testament | 28 |
| It fell on Chicken Little | 25 |
| It fell on Chicken-Little | 25 |
| It fell to Earth in 2001 | 24 |
| It fills festival slot | 22 |
| It fills in between E and F | 27 |
| It finds itself in hot water | 28 |
| It finishes with a zip | 22 |
| It fires electric darts | 23 |
| It first aired on 8/1/81 | 24 |
| It first circulated in 2000 | 27 |
| It first flew in '47 | 24 |
| It first flew in '48 | 24 |
| It first opened in 1962 | 23 |
| It fits all, in a phrase | 24 |
| It fits all, so they say | 24 |
| It fits all, sometimes | 22 |
| It fits around a mouth | 22 |
| It fits into a mortise | 22 |
| It fits over a light bulb | 25 |
| It flattens as it ages | 22 |
| It fled with the spoon | 22 |
| It flies all over London | 24 |
| It flies but has no tail | 24 |
| It flies close to the ground | 28 |
| It flies through barrels | 24 |
| It flooded Florence in 1966 | 27 |
| It flows along La Rive Gauche | 29 |
| It flows for 1,575 miles | 24 |
| It flows for 3,485 miles | 24 |
| It flows from Lake Victoria | 27 |
| It flows from some fountains | 28 |
| It flows in a Burns poem | 24 |
| It flows into the Caspian | 25 |
| It flows into the Columbia | 26 |
| It flows into the Rhone | 23 |
| It flows into the Seine | 23 |
| It flows into the Wash | 22 |
| It flows past Florence | 22 |
| It flows past Khartoum | 22 |
| It flows past Orléans | 24 |
| It flows SSW into the Rhone | 27 |
| It flows through Egypt | 22 |
| It flows through Florence | 25 |
| It flows through flues | 22 |
| It flows through Gainsborough | 29 |
| It flows through Knottingley | 28 |
| It flows through Texas | 22 |
| It flows through the Seine | 26 |
| It flows through Turin | 22 |
| It flows through un fleuve | 26 |
| It flows through Utica | 22 |
| It flows through Vienna | 23 |
| It flows to Oneida Lake | 23 |
| It flows to the Baltic Sea | 26 |
| It flows to the Caspian Sea | 27 |
| It flows to the Dead Sea | 24 |
| It flows with the wind | 22 |
| It followed "Typee" | 29 |
| It followed a girl to school | 28 |
| It follows "Sirs" | 27 |
| It follows a curtain opening | 28 |
| It follows a curtain-raising | 28 |
| It follows a long March | 23 |
| It follows a mine line | 22 |
| It follows a pair of hips | 25 |
| It follows a transitive verb | 28 |
| It follows any direction | 24 |
| It follows April in Paris | 25 |
| It follows conjugation rules | 28 |
| It follows directions? | 22 |
| It follows evening or ball | 26 |
| It follows four but not five | 28 |
| It follows high or Texas | 24 |
| It follows hyper or hypo | 24 |
| It follows Leap Day: Abbr. | 26 |
| It follows lights and camera | 28 |
| It follows no- or low- | 22 |
| It follows Shrove Tuesday | 25 |
| It follows soft or silver | 25 |
| It follows song or slug | 23 |
| It follows St. or Mrs. | 22 |
| It follows sunset, in poetry | 28 |
| It follows the 180th meridian | 29 |
| It follows the British? | 23 |
| It follows the evening news | 27 |
| It follows the first curtain | 28 |
| It follows the Gospels | 22 |
| It follows the last Gospel | 26 |
| It follows the last quarter | 27 |
| It follows the overture | 23 |
| It follows winter (abbr.) | 25 |
| It follows winter: abbr. | 24 |
| It forms a strong bond | 22 |
| It forms attachments at sea | 27 |
| It forms food vacuoles | 22 |