Vagrant, male, caught in snare (5)
I believe the answer is:
tramp
'vagrant' is the definition.
(thesaurus)
'male caught in snare' is the wordplay.
'male' becomes 'm' (common abbreviation).
'caught in' indicates putting letters inside.
'snare' becomes 'trap' ('trap' can be a synonym of 'snare').
'm' inserted into 'trap' is 'TRAMP'.
(Other definitions for tramp that I've seen before include "Vagrant, hobo" , "Walk heavily or wearily" , "Walk heavily - steamer" , "Walk noisily; vagrant" , "Walk heavily and firmly" .)