Hour in cutter assembled in Dutch city (7)
I believe the answer is:
utrecht
'dutch city' is the definition.
(I've seen this in another clue)
'hour in cutter assembled' is the wordplay.
'hour' becomes 'h'.
'in' indicates putting letters inside.
'assembled' indicates an anagram.
'cutter' anagrammed gives 'utrect'.
'h' put inside 'utrect' is 'UTRECHT'.
'in' acts as a link.
(Other definitions for utrecht that I've seen before include "European treaty?" , "Dutch city where treaty was signed in 1713" , "Dutch city where peace treaties were signed to end the 1701-14 War of the Spanish Succession" , "City of historic treaty, 1713" , "Dutch city whose name was given to a 1713 treaty" .)