Crossword Genius

Two men reported Hazel (7)

Ross

I believe the answer is:

filbert

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'hazel' is the definition.
(I know that filbert is a type of hazel)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for filbert that I've seen before include "Nut -- left rib (anag)" , "Hazel nut" , "Type of hazelnut" .)

I've seen this clue in The Mirror.
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