Mind finishing early, coach? (3)
I believe the answer is:
car
'coach?' is the definition.
(thesaurus)
'mind finishing early' is the wordplay.
'mind' becomes 'care' (I've seen this before).
'finishing early' means to remove the last letter.
'care' with its final letter taken off is 'CAR'.
(Other definitions for car that I've seen before include "Passenger vehicle" , "Private vehicle" , "Auto" , "Road vehicle; rail coach" , "Railway carriage; vehicle" .)