Quick reversing trams (5)

I believe the answer is:

smart

'quick' is the definition.
(I've seen this before)

'reversing trams' is the wordplay.
'reversing' shows that the letters should be reversed in order.
'trams' in reverse letter order is 'SMART'.

(Other definitions for smart that I've seen before include "Spruce; sting" , "Bright; sting" , "Alick" , "Clever; sting" , "Chic - hurt" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app