Neat public transport is coming back! (5)
I believe the answer is:
smart
'neat' is the definition.
(synonyms)
'public transport is coming back' is the wordplay.
'public transport' becomes 'trams' (I've seen this before).
'is coming back' shows that the letters should be reversed in order.
'trams' back-to-front is 'SMART'.
(Other definitions for smart that I've seen before include "astute" , "Bright; sting" , "turned out nicely" , "Neat, tidy; sting" , "it hurts!" .)