Frequently visits relatives after hours (6)
I believe the answer is:
haunts
'frequently visits' is the definition.
(I've seen this before)
'relatives after hours' is the wordplay.
'relatives' becomes 'aunts' (aunt is a kind of relative).
'after' is a charade indicator (letters next to each other).
'hours' becomes 'h'.
'aunts' put after 'h' is 'HAUNTS'.
(Other definitions for haunts that I've seen before include "Inhabits as a ghost" , "Places where ghosts hang out?" , "Frequently visits" , "Visits like a ghost" , "Frequently visited places, hangouts" .)