Stage production of Aida short of an alto and soprano (4)
I believe the answer is:
dais
'stage' is the definition.
(type of platform or stage)
'production of aida short of an alto and soprano' is the wordplay.
'production of' indicates an anagram.
'short of' suggests deleting specific letters.
'an alto' becomes 'a' (musical abbreviation).
'and' is a charade indicator (letters next to each other).
'soprano' becomes 's' (musical abbreviation).
'aida' with 'a' taken out is 'ida'.
'ida' with letters rearranged gives 'dai'.
'dai'+'s'='DAIS'
(Other definitions for dais that I've seen before include "Low platform at end of hall" , "stepping up here?" , "stand" , "Raised floor" , "Platform; podium" .)