ACROSS
 1. <hearthrob> MATINEE IDOL = (MODEL IN A TIE)*
 8. <twill fabric> SERGE = "SURGE"
 9. <hairstyle> CHIGNON = CH IG NON
10. HE IRES S = HEIRESS <she has it coming?>
11. BONO outside G = BONGO <percussion instrument>
12. ST + RIFE = STRIFE <conflict>
14. _UTPACE_* = TEACUP <vessel>
17. <supporter of art> EASEL = EASE L_
19. <hospital official> ALMONER = _A_L_M ON + ER
21. DOILIES* = IDOLISE <put on pedestal>
22. <conspicuously ignore> FLOUT = F LOUT
23. <stingy> TIGHT-FISTED = (TITHED GIFTS)*

DOWN
 1. <bedlam> MASS HYSTERIA = (.o)M AS SHYSTER I A(r.)
 2. TIER outside ERR = TERRIER <dog>
 3. <relative> NIECE = I E_ C_ E_ after N
 4. EX CU _S _E = EXCUSE <alibi>
 5. D_ RIBBLE = DRIBBLE <thin stream>
 6. ←NE_ NIL← = LINEN <bedsheets?>
 7. <built-in> INCORPORATED = (INDOOR CARPET)*
13. <satisfying> FILLING = FLING outside I L
15. <mingle> CONSORT = CONS OR T_
16. <legal document> PATENT = PATE + NT
18. ⭯COOTS⭯ = SCOOT <get moving>
20. MU + FIT* = MUFTI <casualwear>