Beer or punch (6)

I believe the answer is:

wallop

I believe this is a double definition.

'beer' is the first definition.
(I've seen this before)

'punch' is the second definition.
(I've seen this before)

'or' is the link.

(Other definitions for wallop that I've seen before include "ale?" , "Thrash - beer (slang)" , "buffet?" , "Alcoholic drink" , "A heavy resounding blow (6)" .)

I've seen this clue in the Evening Standard.

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