Direction to players to reduce noise — part of one I composed (5,5)

I believe the answer is:

forte piano

'direction to players to reduce noise' is the definition.
(musical direction meaning to play loud then soft)

'part of one i composed' is the wordplay.
'composed' indicates an anagram.
'part'+'of'+'one'+'i'='partofonei'
'partofonei' with letters rearranged gives 'FORTE-PIANO'.

I've seen this clue in The Guardian.

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