Piano used in old-time musical drama? (5)
I believe the answer is:
opera
'musical drama?' is the definition.
(I've seen this before)
'piano used in old-time' is the wordplay.
'piano' becomes 'p'.
'used in' means one lot of letters goes inside another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'time' becomes 'era' (I've seen this before).
'o'+'era'='oera'
'p' put inside 'oera' is 'OPERA'.
(Other definitions for opera that I've seen before include "Eg, Don Giovanni" , "Falstaff, say" , "Musical entertainment" , "Eg, The Magic Flute" , "Dramatic genre" .)