ACROSS
1. PEASANTCLUE* = ENCAPSULATE <to express concisely>
7. <shrub> AZALEA = (-m)AZ(-e) + A LEA
8. <flatter> COAX = "COKES"
9. (ICANT)* + GOUT = ACTING OUT <flaring up>
12. TANORLAZE* = LANZAROTE <holiday destination>
14. SH after BA = BASH <party>
15. <strong> POTENT = POT outside TEN
17. SKIER outside (YET ERR) = SKYE TERRIER <dog>

DOWN
2. OZ inside (N ECO) = NOZECO <non-alcoholic wine>
3/11. AL + (LANCE outside TO) = ALL AT ONCE <without warning>
4. STAR + (GP IE) outside (A ZY) = STARGAZY PIE <Cornish dish>
5. "LACKER" = LACQUER <coat>
6. "TOWED" = TOAD <jumper>	
10. IVE outside NOAH* = IVANHOE <literary epic>
13/16. <sailor> JACK TAR = →"TACK JAR"←