Crossword Genius

Two females in car -- it crashed in market (7)

Ross

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" .)

I've seen this clue in The Telegraph.
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