Man exposing pecker on stage (7)
I believe the answer is:
stephen
'man' is the definition.
(I've seen this before)
'pecker on stage' is the wordplay.
'pecker' becomes 'hen' (I've seen this in another clue).
'on' is a charade indicator (letters next to each other).
'stage' becomes 'step' (I've seen this in other clues).
'hen' put after 'step' is 'STEPHEN'.
'exposing' is the link.
(Other definitions for stephen that I've seen before include "-- King, US horror writer" , "-- Hawking (A Brief History of Time)" , "Old king" , "Chap" , "-- Hawking, English physicist" .)