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' is a deletion indicator.
'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 away 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" .)