| PLANED | Levelled off, having gone up in aircraft |
| SCALED | Went up mountain? Fell off, having gone first (6) |
| TOOKOFF | Expanded at speed, having gone up in the air (4,3) |
| FASTING | Eggs having gone up in smoke, Shrove Tuesday over, evidently? (7) |
| AVOISION | I so messed up in aircraft tax fiddle |
| ZEPPELIN | One of the Marx brothers briefly hovers over river, going up in aircraft |
| KYLE | Narrow strait in Kentucky levelled off (4) |
| EVENED | Levelled off: ...... out (6) |
| BOTTOMED | ___ out, reached the lowest point and levelled off (8) |
| GRADED | With little Greek, it's dead awkward to be levelled off (6) |
| SPIDER | Creature goes down again, maybe, having gone up |
| TWOS | Weight having gone up, needing very large braces |
| MOTTO | Saw bishop out of bed, having gone up (5) |
| GROWN | Wail audibly having gone up a size or two (5) |
| YOYO | Plaything, time after time having gone up? (2-2) |
| TWISTED | Turned, weight having gone up, to new diets (7) |
| SFUMATO | From the Italian for "gone up in smoke", a subtle blending of colours and tones in painting, of which Leonardo was the chief exponent (7) |
| RISEN | Gone up in the polls |
| FILTERTIP | Trifle ruined, mine's gone up in smoke! (6,3) |
| SKYWRITER | His advertising has gone up in smoke |
