Unsuccessful person taken in by close relatives (5)
I believe the answer is:
loser
'unsuccessful person' is the definition.
(synonyms)
'taken in by close relatives' is the wordplay.
'taken in by' indicates a hidden word.
'LOSER' is hidden within 'close relatives'.
(Other definitions for loser that I've seen before include "Failed competitor" , "Washout" , "Generally inept" , "A failure, also-ran" , "Unsuccessful competitor" .)