| OPTIMISED | Timid pose made to be effective |
| TODI | ___ World pose made famous by Usain Bolt: 2 wds. |
| ASANA | Pose made at a yogi's prompting |
| DOTHETRICK | Request to a magician, perhaps, gets to be effective (2,3,5) |
| STRIKEHOME | House supports industrial action to be effective (6,4) |
| OPERATE | Musical drama by Lawrence found to be effective (7) |
| TEETH | Some write ethically on power to be effective (5) |
| MARTELLO | Brought back battering equipment to be effective against old fort |
| WOODWORK | Is likely to be effective, we hear, as school subject |
| SESAME | Seed said to be effective in opening spell |
| WORKLIKEACHARM | How goldfinches toil to be effective (4,4,1,5) |
| TESTED | Known to be effective |
| BYTE | A word from IT to be effective when spoken |
| LACTAM | Part of chemical to be effective in upsetting sickness |
| TIMETESTED | Proved to be effective over a period (4-6) |
| SHIFTWORK | Move to be effective in employment practice (5,4) |
| SIEVES | They strain to be effective in kitchens? (6) |
| DOTHEBUSINESS | Sound bite she's contrived to be effective (2,3,8) |
| SAFETYPIN | Edges to possibly fasten? I should be effective! (6,3) |
| DROPSHOTS | What golfers hate to do can be effective in squash (4,5) |
