Pirates assembling store of beer (11)

I believe the answer is:

freebooters

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'pirates' is the definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

'assembling store of beer' is the wordplay.
'assembling' indicates an anagram.
'store'+'of'+'beer'='storeofbeer'
'storeofbeer' anagrammed gives 'FREEBOOTERS'.

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