| HALFLIFE | Alfred by lake provided he goes round takes 50 per cent of radioactive time (4-4) |
| HALVE | Take 50 per cent share of lethal venom (5) |
| LIFE | Being by lake provided energy (4) |
| EMULATOR | Big bird takes 50 on a hill, the copier (8) |
| WHITEWEDDING | It requires father's permission provided he wears what he likes and she does't have a choice (5,7) |
| LIFTOFF | Launch from lake, provided the swell ends |
| ENDURED | Runner's first in provided he had lasted the distance (7) |
| LAIR | It takes 50 to ventilate the den |
| AEON | Every second wage round takes a long time (4) |
| DAYRETURNS | Trendy Ursula takes fifty from you and goes straight home before midnight using these. (3,7) |
| GIST | Great round takes place, making point |
| TSARINA | Worker sent round takes in dress for Hindu empress (7) |
| PANAMANIAN | Ian - the man with a plan - takes fifty travelling in Central America. (10) |
| STRANGELY | Way over mountains takes fifty years, unusually |
| HILLSIDE | After lunchtime two learners join Sid as he goes round slope (8) |
| HALFMOON | 50 per cent of the wax, perhaps (4,4) |
| FELDSPAR | Constituting around 50 per cent of Earth's crust, any of various rockforming minerals including amazonite, labradorite and moonstone (8) |
| ICEGAMES | Torvill and Dean make up 50 per cent of this group of judges on an ITV show (3,5) |
| ACTINIDE | Any of a series of radioactive elements |
| REGULATE | You can relate to 50 per cent of guns if you know how to control them (8) |
