Draw in at region (7)
I believe the answer is:
attract
'draw in' is the definition.
(synonyms)
'at region' is the wordplay.
'region' becomes 'tract' (both can mean a large piece of land).
'at'+'tract'='ATTRACT'
(Other definitions for attract that I've seen before include "Behave like a magnet" , "Draw to oneself" , "Act as a magnet" , "'Draw, charm (7)'" , "To be liable to" .)