Old piano parts newly arranged for Aida, perhaps (5,5)
I believe the answer is:
grand opera
'aida perhaps' is the definition.
I can't judge whether this defines the answer.
'old piano parts newly arranged' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'piano' becomes 'p' (musical abbreviation).
'parts' indicates putting letters inside (in the sense of cuts or separates).
'newly' is an anagram indicator.
'o'+'p'='op'
'arranged' anagrammed gives 'grandera'.
'op' placed inside 'grandera' is 'GRAND OPERA'.
'for' is the link.
Can you help me to learn more?
(Other definitions for grand opera that I've seen before include "major theatrical project" , "'Aida', for instance?" , "stage project" , "Lavish stage work" , "Musical entertainment" .)