Play rehearsal? (8,4)

'play rehearsal?' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'play rehearsal?' is the wordplay.
I cannot quite see how this works, but
'play' could be 'game' and 'game' is found in the answer.
'rehearsal?' could be 'practice' (rehearsal is a kind of practice) and 'practice' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?