Temporary work on set? (6)
I believe the answer is:
acting
I believe this is a double definition.
'temporary' is the first definition.
('acting' can be similar in meaning to 'temporary')
'work on set?' is the second definition.
(Other definitions for acting that I've seen before include "Taking on duties temporarily" , "employment undertaken by players" , "Feigning" , "Stand-in" , "Temporary - work in the theatre" .)