Family found in street with no money (5)
I believe the answer is:
skint
'with no money' is the definition.
'family found in street' is the wordplay.
'family' becomes 'kin' (synonyms).
'found in' indicates putting letters inside.
'street' becomes 'st'.
'kin' placed within 'st' is 'SKINT'.
(Other definitions for skint that I've seen before include "Impoverished" , "Broke (sl.)" , "Stony broke" , "Without money (slang)" , "Extremely poor" .)