When schools are open, including one for acting? (7)
I believe the answer is:
interim
'one for acting?' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for interim that I've seen before include "not there for ever" , "temporary period" , "Meantime - provisional" , "Meantime; temporary" , "An intervening period of time" .)