| NATURALSCIENCE | Geology, say, unaffected by terribly scenic top of estuary (7,7) |
| RHINE | River runs back, almost reaching top of estuary (5) |
| SCIENCE | Branch of knowledge is terribly scenic, to a point (7) |
| CREATIONIST | Believer in the pseudoscientific theory of flood geology, say |
| PRESCIENCE | Foresight is quiet about terribly scenic point (10) |
| ROCKETSCIENCE | Rush to terribly scenic Spain - that's a difficult subject (6,7) |
| BATHE | Swim from mouth of estuary by south-western city (5) |
| TENNIEL | Illustrator of bird in flight crossing head of estuary |
| UMBRAGE | Offence, dropping bit of cloth in centre of estuary |
| PREY | Pair found by banks of estuary or quarry (4) |
| REALIST | One who takes a practical view of new trails round head of estuary (7) |
| DIVERSE | A variety of frogmen present at mouth of estuary (7) |
| DESCRIBE | Give details of tartan rejected by terribly scatter-brained characters |
| SCI | Ecology or geology, say: Abbr. |
| THROWINTHETOWEL | Give up feature of football supported by terribly wet lot, eh? (5,2,3,5) |
| VERMOUTH | It perhaps runs one out of estuary (8) |
| GREYEST | Most white, egrets flying across end of estuary (7) |
| ETERNITY | Aquatic bird - it nested in banks of estuary for donkey's years |
| EMERGE | Surface of estuary leading to pool (6) |
| TIDES | Ebbs and flows of estuary waters (5) |
