ACROSS
 1. RUM + ←MO OR SUP← = RUMPUS ROOM <rec space>
 6. PE + AS = PEAS <healthy protein source>
10. FLINCHES - L = FINCHES <songbirds>
11. <bride-to-be> FIANCÉE = (CAFÉ IN)* _E_
12. COL OO outside RAD = COLORADO <part of US>
14. COR A L = CORAL <sea creature>
16. COPY outside AN = CANOPY <upper part of forest>
17. (TRIO BELT)* = LIBRETTO <words from opera>
19. ASS AS SIN = ASSASSIN <murderer>
21. <exacerbate> WORSEN = ←ROW← SEN
24. <crook> CHEAT = C_ HEAT
25. SPOUT outside ACE = SPACE OUT <daydream>
27. ←A LOG RE P_← PERGOLA <archway>
28. <cocktail> SIDECAR = (AS CIDER)*
30. D + ISH = DISH <hot guy>
31. MADE LEES outside IN = MADELEINES <cakes>

DOWN
 1. "ROUGH" = RUFF <neckwear>
 2. ONS inside MOON = MONSOON <wet season>
 3. ←H GU← = UGH <disgusted grunt>
 4. <ne'er-do-well> RASCAL = (A SCAR)* L_
 5. (OFF TO PIC) = OFF-TOPIC <irrelevant>
 7. <passage> EXCERPT = R inside EXCEPT
 8. <charmed> SPELLBOUND = SPELL + BOUND
 9. (A PERSON + MAC)* = MASCARPONE <cheese>
13. (OP POSITION) = OPPOSITION <party>
15. CR PATCH* inside SAD = SCRATCHPAD <notebook>
18. KIN (HAS inside SA) = KINSHASA <capital>
20. <mountain ranges> SIERRAS = (.n)SIER RAS(p.)
22. <taste> SOUPÇON = SOUP CON
23. S_S inside HALE = HASSLE <amount of trouble>
26. I_ R_I_S = IRIS <personification of rainbows>
29. <cube> DIE = DI + E