Vagrant male caught by snare (5)
I believe the answer is:
tramp
'vagrant' is the definition.
(I've seen this before)
'male caught by snare' is the wordplay.
'male' becomes 'm' (common abbreviation).
'caught by' indicates putting letters inside.
'snare' becomes 'trap' (synonyms).
'm' inserted into 'trap' is 'TRAMP'.
(Other definitions for tramp that I've seen before include "Itinerant" , "Walk heavily - steamer" , "Vagabond, hobo" , "Beggar or vagrant" , "Footslog" .)