Blocked piano moved with effort (7)

I believe the answer is:

plugged

'blocked' is the definition.
(thesaurus)

'piano moved with effort' is the wordplay.
'piano' becomes 'p'.
'moved with effort' becomes 'lugged' (to lug is to carry or drag something heavy).
'p'+'lugged'='PLUGGED'

I've seen this clue in The Guardian.

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