Twins eating out, sampling drink (4-7)

I believe the answer is:

wine tasting

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

'twins eating out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'twins'+'eating'='twinseating'
'twinseating' with letters rearranged gives 'WINE-TASTING'.

Can you help me to learn more?

(Other definitions for wine tasting that I've seen before include "Ceremony" , "Oenophiles indulge in it" .)

I've seen this clue in The Telegraph.

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