No-no at bridge (6)

I believe the answer is:

renege

(Other definitions for renege that I've seen before include "Go back on one's word, break promise" , "Fail to fulfil a promise or obligation" , "Fail to keep promise, or revoke in cards" , "Fail to follow suit at cards" , "Withdraw" .)

I've seen this clue in the Penny Press.

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