Perform a soft song (4)

I believe the answer is:

play

'perform' is the definition.
(playing is a kind of performing)

'a soft song' is the wordplay.
'a soft' becomes 'p' (musical abbreviation for 'piano'**).
'song' becomes 'lay' (lay is a kind of song).
'p'+'lay'='PLAY'

(Other definitions for play that I've seen before include "Theatrical performance" , "Stage drama" , "Slack - performance" , "Participate in games or sport" , "Uncle's premises" .)

I've seen this clue in the Evening Standard.

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