Tear a trap to pieces (5)
I believe the answer is:
apart
'to pieces' is the definition.
(synonyms)
'tear a trap' is the wordplay.
'tear' indicates an anagram.
'a'+'trap'='atrap'
'atrap' is an anagram of 'APART'.
(Other definitions for apart that I've seen before include "Separate in a trap" , "In pieces; separate" , "First Christmas present from my love" , "in bits" , "Estranged - in pieces" .)