Crossword Genius

Endorse fraternity boldly neglecting rent (6)

Ross

I believe the answer is:

ratify

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

I cannot understand how the rest of the clue works.

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(Other definitions for ratify that I've seen before include "OK" , "Approve and sign" , "Affirm" , "Approve officially" , "Give validity to" .)

I've seen this clue in The Irish Times.
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