Cryptic crossword No 3,812

Across

1. Large-scale digital photo? (4)
2. Voiceover: "dropping litres of glue is the current craze" (5)
3. Deer taking second medicine (4)
4. Initially help each German to be (4,2)
5. One black river heading for goats (6)
6. Communist German in Gateshead is a misdirection (3,7)
7. Code held back by Benito Mussolini (4)
8. American education is nothing new? (4)
9. Flirting resulting from drunken nude love after pub (8)
10. Note about mixer being faulty? (8)
11. Cuba tends to vote tardily for regime change (5,5)
12. Blue Period causing leisure (8)
13. Fool chomped down on tasty morsel? (6)
14. Spooner's kick-back supplies soft drink (4,4)
15. Pirate child given old penny (4)
16. Hill corners it unevenly (5)
17. Leaders of Russia, United States and Europe show cunning (4)
18. Old-style quarry for bird (6)

Down

1. Harbour novel left at sea (7)
2. Venice bridge: criminal insider opposite?! (5,3,7)
3. French wine and French bottle (5)
4. Winemaker's vine binding National Trust castle (7)
5. Soldier eating burst shellfish dumplings (7)
6. Ironing late in the day? (7)
7. Clearing out and scattering (9)
8. Hmm, best revise MRI - strangely, I'm not worried (6,2,7)
9. Monster full of energy - dangerous for city (9)
10. Weep softly: movement is what you're doing? (7)
11. Guarantee completion, or endless sex! (7)
12. Instrument sounded to give root (5)