Adult into country music? A curse (8)
I believe the answer is:
anathema
'curse' is the definition.
(anathema can mean a curse)
'adult into country music? a' is the wordplay.
'adult' becomes 'a' (abbreviation).
'into' indicates putting letters inside.
'country music?' becomes 'anthem' (I've seen this in another clue).
'a' placed inside 'anthem' is 'anathem'.
'anathem'+'a'='ANATHEMA'
(Other definitions for anathema that I've seen before include "odious" , "B?te noire, hated thing" , "Abomination, bugbear" , "loathsome" , "Cursed thing" .)