BII, CAMRA, SPBW etc a help as to pub undergoing refurbishment? (8,4)

I believe the answer is:

alphabet soup

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'refurbishment?' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I can't see?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for alphabet soup that I've seen before include "confusing composition" , "A-Z served with a ladle?" , "Confusing assortment (of letters)" , "Letter-filled broth?" , "A confusing series of letters" .)

I've seen this clue in The Sunday Times and The Times.

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