Cryptic crossword No 3,418

Across

1. Arch is elegantly holding shape (6)
2. Be quiet as she uncovered bottom (2)
3. Met up after dance for amusement, perhaps (6)
4. Crash test dummy with tool? (6,6)
5. Pull bird before church (6)
6. Comfortable in horrid old towel (4,2,2)
7. Definite swindle on Greek island (8)
8. Leave game (2)
9. Disorder upsets arrangements (3,3)
10. Attack going badly (7)
11. Gang laid bare in article (2)
12. Spooner to surround prison with blunt object (12)
13. Might grip nuts crossing river, perhaps (7)
14. Hammer hotel lamentably reviewed from the outset (6)
15. They lock up and they turn in (6)
16. Strike a light! (5)
17. Young lady is damsel at heart (2)
18. Identifies butcher slain (5)

Down

1. Paces around after retreat - isn't it French! (1,3,2,3)
2. Greedy gut's asking for extra (3)
3. To survive bring in leaders of Luxembourg, invariably getting richer (9)
4. Visit playground, skip endlessly with composer (7)
5. Writer perhaps has serious talking to (6)
6. Shabby fellow in soccer war beaten up (9)
7. Most kind and moving US anthem (8)
8. Tooth pulled from Eskimo largely (5)
9. Rigid build (5)
10. Unopened toy gives pride (3)
11. Airline in Bristol for easy returns (8)
12. Writer spoken of after a short training program (6)
13. Girl, American with fever, perhaps (5)
14. Shuffle game captures hearts in Surrey town (5)
15. Celebration over detailed message on survey in islands, perhaps (9)
16. Clipped coin counter with lever (7)