Play maiden in RADA cast (5)
I believe the answer is:
drama
'play' is the definition.
('drama' can be a synonym of 'play')
'maiden in rada cast' is the wordplay.
'maiden' becomes 'm' (cricket abbreviation).
'in' is an insertion indicator.
'cast' is an anagram indicator.
'rada' anagrammed gives 'draa'.
'm' inserted within 'draa' is 'DRAMA'.
(Other definitions for drama that I've seen before include "Theatrical work" , "Literary genre for the stage" , "Plays as a genre" , "Theatrical entertainment" , "Plays as branch of literature" .)