A gin knocked back in two places? (5)
I believe the answer is:
apart
'in two places?' is the definition.
(I've seen this in another clue)
'a gin knocked back' is the wordplay.
'gin' becomes 'trap' (I've seen this before).
'knocked back' is a reversal indicator.
'trap' backwards is 'part'.
'a'+'part'='APART'
(Other definitions for apart that I've seen before include "in isolation" , "First Christmas present from my love" , "set aside" , "In pieces; separate" , "Separately, aside" .)