Vessel's power cut - trouble (4)

I believe the answer is:

pail

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'vessel's' is the definition.
(pail is a kind of vessel)

'power cut trouble' is the wordplay.
'power' becomes 'p' (symbol in physics).
'cut trouble' becomes 'ail' (synonyms. I am not sure about the 'cut' bit.).
'p'+'ail'='PAIL'

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(Other definitions for pail that I've seen before include "Container; sounds like dim" , "water-carrier" , "it may go down well" , "Kind of bucket - ask Jack and Jill" , "A bucket - the kind Jack and Jill used" .)

I've seen this clue in The Guardian.

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