On stage in temporary role? (6)
I believe the answer is:
acting
I believe this clue is a double definition.
'on stage' is the first definition.
(I've seen this before)
'in temporary role?' is the second definition.
(as in an acting leader)
(Other definitions for acting that I've seen before include "stagecraft" , "Temporary - work as a thespian" , "Taking on duties temporarily" , "Performing or standing in for another" , "Caretaker" .)