Cryptic crossword No 1,213

Across

1. Flat piece of seaweed back in press (4)
2. Turning green with a hint of nausea where one might be seasick (5)
3. Mount Everest trekker never ascended tops (4)
4. One merges into switchback to see show (6)
5. "SNAKE!!!!!" in comic sans, almost glitching out (8)
6. Right over spot that is for speaker's handler (6)
7. With hip, lean over end of line for red card? (4,4)
8. Change . . (4)
9. . . . tea keeping hot in porcelain (5)
10. Meal from west of Finland (not southwest or east) (4)
11. Monetize novel in region within the hour? (4,4)
12. Piece of armor with a copper outline (6)
13. Swatch of creepy tone going back in make-up set? (8)
14. One ornately made, with diamonds in front! (6)
15. I, in the past, was a villain (4)
16. Present trailer featuring in notice (5)
17. Attempt second hit on the rebound (4)

Down

1. Bum off of leader (8)
2. Very much how a bit may be debited? (6)
3. Cat's beginning to jump on board with dog (6)
4. Note in the morning papers (4)
5. Constricting snake and asp start to bite a criminal (8)
6. Follow #2 with specific instructions (8)
7. Maybe Nanook's family senses what's going on only the second time (6)
8. "Bone," possibly made by children's book author who is the source of the words circling this grid (5)
9. In battle, overly exacting leader carries small bag when retreating (3-2-3)
10. Maybe DILF, topless, is visiting and offering special favors to friends (8)
11. Site with coal rocks for all of us (8)
12. One cold to walk over! (6)
13. Confuses rider sitting on this when cycling? (6)
14. Pass, or otherwise getting a pass (6)
15. Capital instruction given to a sculler, roughly speaking? (4)