Ghost in Hampton wandering about (7)
I believe the answer is:
phantom
'ghost' is the definition.
(I know that ghost can be written as phantom)
'hampton wandering about' is the wordplay.
'wandering about' indicates anagramming the letters (I've seen this in other clues).
'hampton' is an anagram of 'PHANTOM'.
'in' is the link.
(Other definitions for phantom that I've seen before include "Spirit" , "Something creepy" , "Ballet-dancing costume" , "Wraith" , "Blush" .)