Catch he-men cavorting around top of stage (6)
I believe the answer is:
enmesh
'catch' is the definition.
(thesaurus)
'he-men cavorting around top of stage' is the wordplay.
'cavorting' is an anagram indicator.
'around' means one lot of letters goes inside another.
'top of' says to take the initial letters.
The initial letter of 'stage' is 's'.
'he'+'men'='hemen'
'hemen' is an anagram of 'enmeh'.
'enmeh' going around 's' is 'ENMESH'.
(Other definitions for enmesh that I've seen before include "Tangle up in a net" , "Entangle as in net" , "Involve, as in a net" , "Catch in net" , "Never growing old" .)