Belonged, but need a trip away ... (9)
I believe the answer is:
pertained
'belonged' is the definition.
(pertaining is a kind of belonging)
'need a trip away' is the wordplay.
'away' is an anagram indicator.
'need'+'a'+'trip'='needatrip'
'needatrip' is an anagram of 'PERTAINED'.
'but' acts as a link.
(Other definitions for pertained that I've seen before include "Was applicable (to something)" , "bore on" , "Was material" .)