Abdomen, soft little protuberance (4)

I believe the answer is:

tump

'little protuberance' is the definition.
(word for a small hill)

'abdomen soft' is the wordplay.
'abdomen' becomes 'tum'.
'soft' becomes 'p' (musical abbreviation for 'piano'**).
'tum'+'p'='TUMP'

(Another definition for tump that I've seen is " barrow".)

I've seen this clue in The Times.

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