Found on stage (4)
I believe the answer is:
cast
This clue could be a double definition.
'found' is the first definition.
(I've seen this in another clue)
'stage' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe there's a link between them I don't understand?
'on' acts as a link.
Can you help me to learn more?
(Other definitions for cast that I've seen before include "Mould; actors in a play" , "Discard; actors (in play)" , "In which player" , "Shy - group of actors" , "Throw - actors in play" .)