Crossword Genius

Ronald has to perform this piece (5)

Ross

I believe the answer is:

rondo

'this piece' is the definition.
(type of musical composition)

'ronald has to perform' is the wordplay.
'ronald' becomes 'ron' (I've seen this in other clues).
'has' is a charade indicator (letters next to each other).
'to perform' becomes 'do' (both can mean complete an action).
'ron'+'do'='RONDO'

(Other definitions for rondo that I've seen before include "Piece of music with recurring theme" , "Music with repeated refrains" , "Musical piece with a recurring theme" , "has repetitive theme" , "Type of movement" .)

I've seen this clue in the Evening Standard.
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