Ghost seen in Hampton maze (7)
I believe the answer is:
phantom
'ghost' is the definition.
(I know that ghost can be written as phantom)
'hampton maze' is the wordplay.
'maze' is an anagram indicator (I've seen this in other clues).
'hampton' with letters rearranged 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" .)