Crossword Genius

Bows rot! (12)

Ross

I believe the answer is:

fiddlesticks

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

'bows' is the definition.
(fiddlestick is a kind of bow)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for fiddlesticks that I've seen before include "Bilge" , "Rhubarb" , "Bows - nonsense" , "Bother!" , "tripe" .)

I've seen this clue in The Telegraph.
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