One tiny beer improbably producing this (9)

I believe the answer is:

inebriety

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'this' is the definition.
The definition suggests a singular noun which matches the answer.

'one tiny beer improbably' is the wordplay.
'one' becomes 'i' (Roman numeral).
'improbably' indicates anagramming the letters (I've seen this in other clues).
'tiny'+'beer'='tinybeer'
'tinybeer' with letters rearranged gives 'nebriety'.
'i'+'nebriety'='INEBRIETY'

'producing' acts as a link.

Can you help me to learn more?

(Another definition for inebriety that I've seen is " Drunkenness".)

I've seen this clue in The Independent.

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