Canterbury's county (4)
'canterbury's county' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for kent that I've seen before include "Knew (Scottish)" , "South-eastern county" , "known in Scotland" , "One of the Home Counties" , "County of SE England" .)
(Other definitions for city that I've seen before include "Town with cathedral" , "Urban settlement" , "Eg, London, Coventry" , "Large town" , "See 9" .)