This clue and one more to get a dozen (6)

I believe the answer is:

twelve

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'a dozen' is the definition.
('twelve' can be a synonym of 'dozen')

I can't explain the remainder of the clue.

(Other definitions for twelve that I've seen before include "Half the number here" , "Number of Apostles" , "AM/PM separator?" , "houses in a year?" , "Basis of duodecimal system" .)

I've seen this clue in The Hindu.

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