city on Puget Sound (7)
I believe the answer is:
seattle
'city on puget sound' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for seattle that I've seen before include "major US port" , "Port of north-west USA" , "Sleepless in --, film" , "? American seaport" , "US Pacific seaport" .)