Local drunk finished wall (9)

I believe the answer is:

plastered

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'local drunk' is the definition.
'plastered' can be an answer for 'drunk' (slang term). I'm not certain of the 'local' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for plastered that I've seen before include "Pickled" , "Rendered" , "spread" , "wasted" , "Intoxicated" .)

I've seen this clue in The Irish Times.

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