All answers contain a game, sport or hobby. 1. Bet this game is in geometry (2 letters) 2. Able thin man's dog (deck game) (7) 3. Brilliant bondswoman (9) 4. Ketch (7) 5. After animosity there's time for cards (6) 6. Sybil (at No. 10) (9,3) 7. Many in a petis pois (6) 8. AN21 ahead of the mob (8) 9. Let in another game (7) 10. To and fro! (4,4) 11. It's upsetting but won't leave you in a hole (3,7) 12. Revolved revolver (3) 13. Sneak about ahead of the Queen (7) 14. Any obstacle on a golf course. Dicey! (6) 15. Ban sailor from club (9)