Crossword Genius

Take an oath (5)

Ross

I believe the answer is:

swear

'take an oath' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for swear that I've seen before include "Affirm" , "Use bad language" , "Eff and blind" , "Assert" , "Promise on oath" .)

I've seen this clue in The Sun, The Star Tribune, the Penny Press, the Universal, The Telegraph, The Guardian and the King Feature Syndicate.
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