Quick crossword No 312

Across

1. Rotten idea developed and given direction (10)
2. They'll get you back (6,7)
3. Small stones in bottle (4)
4. Mixed salad left over in a state (2,8)
5. Lets everyone at first order whisky and soda (6)
6. Time a crisis developed - roughly 250 million years ago? (8)
7. Way out, say, on ship (6)
8. North Americans in cinemas ran riot around ten (8)
9. Kiss at last on cheek with these? (4)
10. A fancy airline's doctored accounts cover this period (9,4)

Down

1. Organ stops with silencers (8)
2. Bloomer with dessert and chopped fruit (5,3)
3. Heather devouring books ... naughty books? (7)
4. Tendency to forget a name is crazy (7)
5. Newton starts to investigate science and art combination (5)
6. Partner picks up echo in thoroughfare (5)
7. House found in south east Michigan (4)
8. Extremist in awful tracksuit (5)
9. Hawk is sleek and starts to turn right flying (7)
10. Evita returns in new theatres finally for locals (7)
11. I appeared in one boy's epic story (5)
12. Dog to get sick after time (4)