Crossword Genius

Favour returned for novice (4)

Ross

I believe the answer is:

noob

I'm a little stuck... Click here to teach me more about this clue!

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

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for noob that I've seen before include "novice" , "inexperienced person" .)

I've seen this clue in The Sunday Times and The Times.
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