Men he’s contrived to catch in net (6)
I believe the answer is:
enmesh
'catch in net' is the definition.
(I've seen this before)
'men he's contrived' is the wordplay.
'contrived' indicates anagramming the letters.
'men'+'hes'='menhes'
'menhes' is an anagram of 'ENMESH'.
'to' acts as a link.
(Other definitions for enmesh that I've seen before include "snare" , "Tangle up in a net" , "trap" , "Make tangled as if in a net" , "To ensnare" .)