Expert tours large Dutch city (5)
I believe the answer is:
delft
'dutch city' is the definition.
'expert tours large' is the wordplay.
'expert' becomes 'deft' (I've seen this in other clues).
'tours' is an insertion indicator (to tour can mean to go around).
'large' becomes 'l'.
'deft' going around 'l' is 'DELFT'.
(Other definitions for delft that I've seen before include "Dutch pottery style" , "Netherlands town famed for pottery" , "Potter production" , "Dutch town - tin-glazed earthenware" , "Dutch pottery city" .)