Home? Sailor has it in Derby perhaps! (7)
I believe the answer is:
habitat
'home?' is the definition.
(thesaurus)
'sailor has it in derby perhaps' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'has' says to put letters next to each other.
'in' is an insertion indicator.
'derby perhaps' becomes 'hat' (derby is a kind of hat).
'ab'+'it'='abit'
'abit' put into 'hat' is 'HABITAT'.
(Other definitions for habitat that I've seen before include "Animal's natural home" , "Home ground of an animal" , "Where something's usually found" , "Natural home of an organism" , "place haunted" .)