ACROSS
 9. <often> ROUTINELY = OUT IN inside RELY
10. _E_L _O_P_E_ = ELOPE <rush into relationships>
11. <stop> PREVENT = PR EVENT
12. <plan> ARRANGE = G E_ after ARRAN
13. LASSI[-e] = LASSI <fruity drink>
15. LEO PAT inside CR + A = CLEOPATRA <queen>
17. <lavish payoff after leaving> GOLDEN PARACHUTE = (THE PALACE GROUND)*
19. <record of moment> TIMESTAMP = TIMES TA MP
21. <out-of-line> ASKEW = ASK EW
23. <report> GUNSHOT = GUNS HOT
25. ←LA CID AR_← = RADICAL <extremist>
27. <building support> I-BEAM = IBM outside EA
28. <criticise> CASTIGATE = CAST + I G_A T_E

DOWN
 1. <push> PROPEL = PRO P L outside E
 2. P inside DUE = DUPE <con>
 3. <quality of the muscular> SINEWINESS = WINES inside SINES
 4. <mushroom> DEATH CAP = (PATE HAD)* outside
 5. <dance> GYRATE = ←(.r)ETARY-G(e.)←
 6. F EAR = FEAR <dread>
 7. <lunatic> MOONSTRUCK = →"STREWN MUCK"←
 8. RE + N + EGAD _E = RENEGADE <traitor>
14. LAMA inside SANDER = SALAMANDER <elemental spirit>
16. <personally selected> PICK-AND-MIX = PICKAX outside (ND + MI)
17. <calm down> GET A GRIP = ←PI + R GAT EG←
18. <find new way to describe> REPHRASE = ←PER← SHARE*
20. <ambush> ATTACK = AT TACK
22. ALL inside WET = WALLET <pouch>
24. <in> HOME = HOE outside M_
26. <brown> CHAR = CHA + _R

ACROSS
 1. OUTSOURCE* = COURTEOUS <showing good manners>
 6. <metal> BRASS = BRAS + S_
 9. <view> VISTA = VISA outside T_
10. RATE* SURE _R_ = TREASURER <committee member>
11. <full> REPLETE = RE PE outside LET
12. (WE DON'T)* after L = LETDOWN <disappointment>
13/19. MAI[-n]TAI[-n] = MAI TAI <rum-based beverage>
14. →"COLLIE MODEL"← = MOLLYCODDLE <give too many treats>?
16. C U + TAN DDR IED = CUT-AND-DRIED <without a doubt>
20. ARCH ←CIA← = ARCHAIC <old-fashioned>
22. <ruthless> VICIOUS = ICI inside VOUS
24. <cross> INTERSECT = IN STREET* outside _C_
25. O_ LIVE = OLIVE <green>
26. (.m)EN DO W(i) = ENDOW <fund>
27. <direct attention towards> SPOTLIGHT = ←TH_ GILT OPS←

DOWN
 1. <fill in for> COVER = COVE _R
 2. <crude> UNSOPHISTICATED = (TOUCHED PIANISTS)*
 3. <seller> TRADESMAN = ←NAMED ART← outside S_
 4. M inside O_ A_ TEAL = OATMEAL <cereal>
 5. ELLE inside SHY = SHELLEY <author>
 6. BEST outside E = BESET <plague>
 7. AIRING outside CONDITION = AIR-CONDITIONING <cooler>
 8. (TIGER SEEN)* = SERENGETI <national park>
13. <automate> MECHANISE = (MINES EACH)*
15. <traditional> OLD SCHOOL = O_ LDS CH ←LOO←
17. DU_ + CHESS = DUCHESS <title>
18. VI inside INTRO = IN VITRO <under laboratory conditions>
21. <pointer> ARROW = [-h]ARROW
23. WEPT after _S = SWEPT <won everything>