Benefits of public transport initially overlooked (4)
I believe the answer is:
uses
'benefits' is the definition.
(I've seen this in another clue)
'public transport initially overlooked' is the wordplay.
'public transport' becomes 'buses' (I've seen this before).
'initially overlooked' means to remove the first letter.
'buses' with its first letter taken off is 'USES'.
'of' acts as a link.
(Other definitions for uses that I've seen before include "Consumes; treats" , "Operates" , "'Purposes, functions (4)'" , "manipulates" , "Employs" .)