Peculiar moor space (4)
I believe the answer is:
room
'space' is the definition.
(room is a kind of space)
'peculiar moor' is the wordplay.
'peculiar' indicates anagramming the letters (I've seen this in other clues).
'moor' with letters rearranged gives 'ROOM'.
(Other definitions for room that I've seen before include "Adequate space" , "Box ---, storage area" , "Scope; living space" , "Space within a building" , "Opportunity, scope" .)