Ghost seen in Hampton maze (7)
I believe the answer is:
phantom
'ghost' is the definition.
(I've seen this before)
'hampton maze' is the wordplay.
'maze' indicates an anagram (I've seen this in other clues).
'hampton' anagrammed gives 'PHANTOM'.
'seen in' is the link.
(Other definitions for phantom that I've seen before include "Ballet-dancing costume" , "Apparition, spectre" , "Sightseeing journey" , "RR" , "Spirit" .)