Gloomy music fan acquired husband (4)
I believe the answer is:
goth
'gloomy music fan' is the definition.
(a fan of goth music)
'acquired husband' is the wordplay.
'acquired' becomes 'got' ('get' can be a synonym of 'acquire').
'husband' becomes 'h'.
'got'+'h'='GOTH'
(Other definitions for goth that I've seen before include "Fan of gloomy music" , "Old invader" , "Rock music fan favouring black clothing" , "Youngster clad in black" , "Uncivilised person" .)