Cryptic crossword No 3,109

Across

1. Brown light (3)
2. Unrestrained pet denned in caves (11)
3. Moon starer, loosely (10)
4. Go person to person with party drinks spiked with the tiniest drop of sedative (2,3,6)
5. Drop endless assessments (3)
6. Dump tar over lake, somewhat (7)
7. Fans overrun defenders (7)
8. Device overly loud at first (4)
9. Delivering man packages (4)
10. Woolly buffalo led infield (3-7)
11. Actors initially putting on coats (7)
12. Small shirt to be more costly (7)
13. Fresh spring date half-depleted daily (9)

Down

1. Gathering group of three means you're right (8)
2. Referee left ignored by group (3)
3. Books from playscript I'm essaying (5)
4. Not once regret Spooner's return (7)
5. Buns seen messed up (7)
6. Take half-developed image of sanctuary (6)
7. Byzantine city ruled by simplicity (9)
8. Local, sublime, tropical clothes (5)
9. Outdated cheer (3)
10. That guy downed dessert from the south and grew excited (6,2)
11. Spearhead is sharp after being without cuts (3-4)
12. Communicate before the media (7)
13. Do shortly saving seconds to fatten up (7)
14. One used positive plan to weaken government (9)
15. Note headless mistake and reflect on it (6)