New Hampshire city (5)
'new hampshire city' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for manchester that I've seen before include "It was once snarled up with cars" , "See 22" , "Endurance - it's them (anag)(10.6)" , "MUFC" , "City of the Halle Orch." .)