Piece played in quietude? (5)

I believe the answer is:

etude

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'piece' is the definition.
(etude is a kind of piece)

'played in quietude?' is the wordplay.
'ETUDE' is hidden within the letters.
However, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for etude that I've seen before include "Testing musical composition" , "Indian statesman" , "bit of practice" , "Noted composition" , "Chopin study" .)

I've seen this clue in the Evening Standard.

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