| OESTROGEN | Sort gene out, taking in oxygen and hormone |
| DOOBRY | Wheeriorum fish taking in oxygen and beginning to breathe (6) |
| RESPIRING | Of a plant, taking in oxygen and releasing carbon dioxide (9) |
| EVANGELIST | One hopes to convert vital genes out of sequence (10) |
| ENDOCRINOLOGY | Branch of physiology and medicine concerned with glands and hormones (13) |
| ENDOCRINOLOGIST | Doctor who specializes in glands and hormones |
| ENDOCRINE | English square occupied by GP right about glands and hormones etc. (9) |
| ULSTER | Rules out taking in top, tails and long loose overcoat (6) |
| HEATINGELEMENT | Husband taking in oxygen, say, as a source of warmth (7,7) |
| BIOTA | Living material little active, taking in oxygen (5) |
| HOARDER | Taking in oxygen, increasingly difficult for squirrel |
| DORY | Fish without water but taking in oxygen (4) |
| ISOTOPE | Is shark taking in oxygen, or one form of it? (7) |
| TRAIL | Last people out, taking in start of rural track (5) |
| INFRARED | Find out, taking in unusual kind of radiation (8) |
| STRAFE | Set out taking in force to harass with gunfire (6) |
| INTERLUDE | Break rule, dine out, taking in last of cabaret |
| REVEAL | Push the boat out, taking in a show |
| EXCITED | Went out, taking in clubs to get intoxicated |
| FELINES | Feels put out taking in cats (7) |
