Play including moon for miniature scene (7)
I believe the answer is:
diorama
'miniature scene' is the definition.
(I've seen this before)
'play including moon' is the wordplay.
'play' becomes 'drama' ('drama' can be a synonym of 'play'**).
'including' is an insertion indicator.
'moon' becomes 'io' (moon of Jupiter).
'drama' going around 'io' is 'DIORAMA'.
'for' acts as a link.
(Other definitions for diorama that I've seen before include "A little set" , "display" , "Model with 3-D figures" , "Miniature three- dimensional scene" , "Miniature 3-D scene -- or a maid (anag)" .)