Crossword Genius

One at the dinner table who pricks hypocrisy? (8)

Ross

I believe the answer is:

decanter

I'm a little stuck... Click here to teach me more about this clue!

'the dinner table who pricks hypocrisy?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

'one' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'an' (I've seen this in other clues) and 'an' is found within the answer.
This may be the basis of clue (or it may be nonsense).

'at' acts as a link.

Can you help me to learn more?

(Other definitions for decanter that I've seen before include "bottle needed" , "Stoppered glass container for alcohol" , "Stoppered liquor container" , "Ornamental bottle for dispensing wine" , "Recanted (anag.)" .)

I've seen this clue in The Times.
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