Cryptic crossword No 3,340

Across

1. Supporters of understanding Lawrence's words. (7-2-6)
2. Reserve position (5-6-4)
3. Sister sad about calamities. (9)
4. Write around the Italian writer. (6)
5. Posh cleric calls round for afters. (8)
6. Shoot crystal to produce elegant drinking vessel. (4-5)
7. Alternative way to get the answer. (7-8)
8. Gentle feathers help to relax. (4-4)
9. London statue has sore back. (4)
10. Sounds like a wave to the peasant. (4)
11. We're told what to see on holiday. (10-5)
12. Gallery chased Greek letter to become different. (6)

Down

1. Holding back the rewriting of an Ontario script. (15)
2. Novel minor ailment relief in rural setting. (4-7-4)
3. Stunning starter was cut short in the middle. (9)
4. Someone who has an old penny can be a bit boring. (6)
5. Spectre of the choppy Irish lake. (5)
6. Digging tools don't begin to make horses go faster. (6)
7. Struggle to create the gap for hanging my sombrero. (6)
8. Ice cream found in Rome held by angel atop the Vatican. (6)
9. Rebel found in fashionable area around ancient city castle is German. (15)
10. African antelope can be seen in New York, Alabama and Austria. (5)
11. Light the device to find tiny bird. (9)