Good person without family is broke (5)
I believe the answer is:
skint
'is broke' is the definition.
(both can mean struggling financially)
'good person without family' is the wordplay.
'good person' becomes 'st' (saint).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'family' becomes 'kin' (synonyms).
'st' enclosing 'kin' is 'SKINT'.
(Other definitions for skint that I've seen before include "Hard up (sl.)" , "bust" , "Impecunious" , "Penniless (slang)" , "Stony-broke" .)