Hang-out is not initially relative (4)
I believe the answer is:
aunt
'relative' is the definition.
(aunt is a type of relative)
'hang-out is not initially' is the wordplay.
'hang out' becomes 'haunt' (I've seen this in another clue).
'is not initially' means to remove the first letter.
'haunt' with its initial letter removed is 'AUNT'.
(Other definitions for aunt that I've seen before include "Parent's sister" , "Charley's in play?" , "Close relative" , "Blood relative" , "Female relation" .)