Car mart maybe (4)

I believe the answer is:

tram

'car' is the definition.
(as in a tram car)

'mart maybe' is the wordplay.
'maybe' is an anagram indicator.
'mart' with letters rearranged gives 'TRAM'.

(Other definitions for tram that I've seen before include "Rail vehicle" , "Urban transport" , "Streetcar" , "Old city transport, ram on rails through streets" , "Take it to the mart" .)

I've seen this clue in the Evening Standard.

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