Two females in car -- it crashed in market (7)
I believe the answer is:
traffic
'market' is the definition.
(thesaurus)
'two females in car it crashed' is the wordplay.
'two females' becomes 'ff'.
'in' is an insertion indicator.
'crashed' is an anagram indicator.
'car'+'it'='carit'
'carit' anagrammed gives 'traic'.
'ff' put inside 'traic' is 'TRAFFIC'.
'in' acts as a link.
(Other definitions for traffic that I've seen before include "Sort of light" , "Group" , "several vehicles" , "Deal illegally , in drugs say" , "Commerce; transport" .)