| IMPULSION | Force to change oil in sump |
| GREASE | Agrees to change oil? (6) |
| BUCK | Value in financial institution maintaining good bonus? Force to change (4,3,4,4) |
| BANGFOR | Value in financial institution maintaining good bonus? Force to change (4,3,4,4) |
| ONES | Value in financial institution maintaining good bonus? Force to change (4,3,4,4) |
| FALTER | Force to change flag (6) |
| LEU | In E. Europe, change oil perhaps after failing to start up |
| VIOLIN | Instrument changes oil into French wine (6) |
| UBOATS | Snake discovered in Utah on top of sump by those formerly in the sink business? (1-5) |
| ARMYSURPLUS | Force leftovers to be cleared from a slurry sump (4,7) |
| NOOKY | A little sump'n-sump'n |
| ASS | Dipstick in part of sump initially |
| SMASHUP | Sump has broken in violent collision (5-2) |
| PISTON | Sump is to necessitate purchasing engine part (6) |
| WARMUPS | Struggle with new sump in preliminary exercises (4-3) |
| PLUMBERSFRIEND | Use this to make blind sump freer? (8,6) |
| CESSPIT | Sulphur in septic ruined sump (7) |
| CHASTENESS | Be quick to fill half of sump for freedom from contamination |
| SINK | A dolina, drain, kitchen/scullery basin, shaft, sump, swallow hole or other depression in a surface (4) |
| SLUDGE | Word for half-melted snow; soft wet mud or mire; dirty sump oil; or, a drab muddy brown or gungy green (6) |
