ACROSS
 6. <not focusing on> GLOSSING OVER = (.i)G LOSS IN GOVER(n.)
 8. MIN I_ ON = MINION <henchperson>
 9. <aristocratic> TITLED = TIT LED
10. _N_ inside CREASED* = ASCENDER <part of letter>
12. <one watering> HOSE = "HOES"
13. _AZ _OV_ = AZOV <Black Sea gulf>
15. _I_ inside SUPPLER = SUPPLIER <dealer>
17. <impress> DAZZLE = DA + _ZZLE
18. <did labour> STROVE = VOTERS*
19. RU LET HERO _O _S _T = RULE THE ROOST <dominate>

DOWN
 1. <hope> ASPIRE = A S P IRE
 2. J + INN = JINN <spirits>
 3. (.t)AG IT PROP(a.) = AGITPROP <political messaging>
 4. KETCH outside V = KVETCH <carp>
 5. EE V inside (GENRE-LESS)* = GREENSLEEVES <song>
 7. <free-enterprise policy> LAISSEZ-FAIRE = "LESS A FARE"
11. "DESERTS" = DESSERTS <fools?>
14. <Hungarian dog> = VIZ S_ L_ A_
16. <piece of bacon> LARDON = (AND ROL_)*
18. <perceived> SEEN = "SCENE"