Some turn to gin (4)
I believe the answer is:
trap
'gin' is the definition.
(I've seen this in other clues)
'some turn' is the wordplay.
'some' becomes 'part' (only part of something).
'turn' shows that the letters should be reversed in order.
'part' in reverse letter order is 'TRAP'.
'to' acts as a link.
(Other definitions for trap that I've seen before include "ladder" , "Snaring device" , "website?" , "Cakehole (slang)" , "that may be sprung?" .)