Cryptic crossword

ACROSS

7. Nil game round is final (5) 8. Sluiced Spearhead persuaded (7) 9. In all fairness, a mere freeze-up (7) 10. Finish topsy-turvy? (3,2) 12. Westminster nut, directionless, finds tool (10) 15. Not fooled by dune device (10) 18. Past deed precise (5) 19. Flavour of the house with an insert (7) 21. Emphasises small monies on account (7) 22. Expand to marvellous proportions? (5)

DOWN

1. Show tricks, etc. turned within a guess (10) 2. Birds up see in for example (5) 3. They were wise and almost magic (4) 4. A perfume will rise (6) 5. It’s a cushy job without remedy (8) 6. Note multi-runged thing is a windbag (7) 11. Have design, almost on a friend like father (10) 13. Incite no ingredient for drug (8) 14. Five in a dance proceed (7) 16. Put your money in stocks – of underwear? (6) 17. Speed boats? (5) 20. Organ sounds more than singularly negative (4)