Single gathering for men only, in the audience’s view (7)
I believe the answer is:
onstage
'only in the audience's view' is the definition.
I can't tell whether this definition defines the answer.
'single gathering for men' is the wordplay.
'single' becomes 'one' (a single thing - only one).
'gathering' means one lot of letters goes inside another (gather can mean to acquire or bring in).
'for men' becomes 'stag' (as in a stag night).
'one' placed around 'stag' is 'ONSTAGE'.
Can you help me to learn more?
(Other definitions for onstage that I've seen before include "(Of actor) visible to the audience" , "Acting" , "as a player may be?" , "In view of house" , "performing in the theatre?" .)