Crossword Genius

Needs no introduction, being braver and more fortunate (7)

Ross

I believe the answer is:

luckier

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'more fortunate' is the definition.
('lucky' can be a synonym of 'fortunate')

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for luckier that I've seen before include "More jammy" , "More fortunate" .)

I've seen this clue in The Irish Times.
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