| WARMBLOODEDNESS | Passion - it's a feature of mammals and birds (4-11) |
| HIPPOCRATICOATH | Doctor takes this large mammal and this small one in chaotic hybrid (11,4) |
| DROPGOAL | Collapse before the end, it's a feature of Rugby (4,4) |
| UREA | Organic compound found in the urine of mammals and synthetically produced to create a high nitrogen- |
| OILWELL | Make very sure there's no friction ___ it's a feature of the Persian Gulf (3-4) |
| AEGEANSEA | It's a feature of the Mediterranean that this divides the Greeks and the Turks (6,3) |
| CHAINSTITCH | Fastens shirt with irritation? It's a feature of the fabric! (5,6) |
| EROSION | Noise or otherwise, it's a feature of coastlines (7) |
| ICE | Finches regularly absent? It's a feature of winter (3) |
| TOTE | ... the others teaching economic principles - it's a feature of many courses |
| BEERHALL | Drink at hotel with everyone - it's a feature of Bavarian culture |
| MIDNIGHTSUN | Star appearing after twelve, it's a feature of an Arctic summer (8,3) |
| HEEL | The back part of the human foot, which corresponds to the point of the hock of hoofed mammals and those that walk on their toes (4) |
| MANDIBLE | A bone of the lower jaw in mammals and other vertebrates (8) |
| RENNIN | Milk- curdling enzyme occurring in the gastric juice of young ruminant mammals and widely used in the production of cheese; also called chymosin (6) |
| MOLLUSCS | Cape gulls eat fish, worms,___, smaller birds, small mammals and vermin. |
| CONCEAL | Study sound of marine mammal and keep out of sight |
| NATHANWHALE | ... a marine mammal and a Revolutionary War spy? |
| DETAIL | It's a feature that the devil is in there most of the time (6) |
| LINEAMENT | It's a feature that may entail men moving around (9) |
