Broke family found in street (5)
I believe the answer is:
skint
'broke' is the definition.
(both can mean struggling financially)
'family found in street' is the wordplay.
'family' becomes 'kin' (synonyms).
'found in' indicates putting letters inside.
'street' becomes 'st' (abbreviation).
'kin' put within 'st' is 'SKINT'.
(Other definitions for skint that I've seen before include "bust" , "On one's uppers" , "Broke (slang)" , "Having little money" , "Impecunious" .)