Accepted thanks about new column (4)

I believe the answer is:

anta

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

I don't understand how the remainder of the clue works.

(Other definitions for anta that I've seen before include "square column" , "tapir" , "PILASTER?" , "architectural feature" .)

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

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