Tolerate an ancestor, say (7)

I believe the answer is:

forbear

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'tolerate' is the definition.
(thesaurus)

I don't understand the rest of the clue.

(Other definitions for forbear that I've seen before include "Refrain from doing something" , "Be patient" , "Abstain" , "Hold back" .)

I've seen this clue in The Irish Independent.

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