Hard men trap insect (6)
I believe the answer is:
hornet
'insect' is the definition.
(hornet is a kind of insect)
'hard men trap' is the wordplay.
'hard' becomes 'h'.
'men' becomes 'or' (I've seen this in other clues).
'trap' becomes 'net' (net is a kind of trap).
'h'+'or'+'net'='HORNET'
(Other definitions for hornet that I've seen before include "Throne (anag.)" , "Troublesome nester" , "Throne for a kind of wasp" , "Large social wasp with fierce sting" , "Large wasp with vicious sting" .)