DOUBLE CROSSWORD

CRYPTIC CLUES: Across

7. It couldn't be better for one to do some trading (5) 8. Small pupils seen in laceup shoes! (7) 9. I'm backing tunes transposed for dances (7) 10. Complicated plot about a philosopher (5) 12. Fastener for priming the hand grenade? (7,3) 15. Somehow sustain the keen supporter (10) 18. Infernal poet? (5) 19. He uses a blade in a row (7) 21. National emblem taken from the list (7) 22. French writer produces "The Tuft of Feathers" (5)

Down

1. A business colleague? (4,6) 2. A piece of deception sounds ill-defined (5) 3. Nearly all the navy escape (4) 4. When we get involved with rough seas, it creates an up and down movement (6) 5 & 11Dn. Be discreet and retain a personal lawyer (4,4,3,7) 6. Secretly takes one's departure of French settlements (7) 11. See 5 Down 13. Game of chance is permitted in a way (8) 14. Substitute not takin' the chair (5-2) 16. Is more disturbed by comparable atomic nucleus (6) 17. Romantic affair for one like Othello we hear (5) 20. Strikes causing a setback to the boom (4)