Cryptic crossword No 3,778

Across

1. Planning golf course with gold flag-stick at the end (10)
2. Double hit job (6)
3. Dampens one's supply with mist (8)
4. They're found at the edge of a green cape mostly covered in green decoration to the extreme (8)
5. Frank sharpens head of tool (6)
6. Retiring American engineers for certain (4)
7. Old ladies left Mark for some people (6)
8. Coming down for dictator's ruling (7)
9. The Sixth Sense readers? (8)
10. One slimming quicker (6)
11. It's loud and large with, note, heads to uproariously roar (8)
12. Huband with cropped spacious coat (4)
13. Where you might see a title of course (6)
14. Cross some sketchy bridge (6)
15. Live as a 10- or 12-year-old, or where 11 sits? (7)
16. Faulty doctor can't cure a patient's belly (10)

Down

1. Imported a pork pie eaten at last (5)
2. Lace from last shred of befrilled carpet (4)
3. State of 10 ships maintained capsized (5)
4. Live rounds initially impaling the wound by the mouth (4)
5. Criticize lead characters in movie - "... a little bleak" (6)
6. Moor to river bank (4)
7. Information from father dropping daughter for last slice of BLT (4)
8. Directing one very boring engineer (9)
9. Answer to where books are essential? (8)
10. Upset from French liberty (7)
11. Cut piece from tone-deaf rockstars (4)
12. Mentions big smokes need what gets ignition started (5)
13. Stock of type of wine spiked with drug (4)
14. When you might find horse at sea (8)
15. Way I am, firstly unfazed, secondly classy, lastly anti-drugs? (7)
16. It's too hilly leaving Ohio in confusion and anger (9)
17. Start to control much of riotous horde (5)
18. Drive special mode of transport (6)