Quick crossword No 399

Across

1. William flips into abysmal finale? Can't fail (10)
2. Poet firstly spoons almond powder on half-cut photos (6)
3. Criticise Greek island? It's distinct (8)
4. Abysmally nail on after child comes from Mesopotamia (10)
5. Award mass possessive! (6)
6. Charlie in vitro somehow takes the spoils (6)
7. Aim from the east, following her love of 11 Across (6)
8. Irritating measure to replace Norway by Thailand (4)
9. Jarring harp at either end of beach grooms 12 Across (8)
10. A rude fraction? (6)
11. Sandwich Bar ailed, going backwards without leader (4)
12. Sample clumsy boy spy (6)

Down

1. Discreet Libs fighting inside vie after trendy (9)
2. Management initially amazingly graceful, ingenious, lacks execution (5)
3. A yarn taken from many Londoners (5)
4. Paddle using middle of board (3)
5. Why? Elementary! (7)
6. Japanese paper folds? (7)
7. Rub leg for sticky stuff (3)
8. Ignore anonymous refusal in saga novel for confused order caller (6)
9. Profit from fixing jail inside indifference (6)
10. Middling local place wiped first prize to get Siren's home (5)
11. Omits perhaps a deciduous tree in autumn (6,3)
12. America melodramatically conceals Saharan vessel (5)