Crossword Genius

Maker of arrows -- one bringing round fifty (8)

Ross

I believe the answer is:

fletcher

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

'maker of arrows' is the definition.
(I've seen this before)

'one bringing round fifty' is the wordplay.
I cannot really understand how this works, but
'fifty' could be 'l' (Roman numeral) and 'l' is found in the answer.
The remaining letters 'fetcher' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for fletcher that I've seen before include "quarrel-maker?" , "Maybe Christian" , "Old playwright" , "One makes arrows" , "Manufacturer of bows and arrows" .)

I've seen this clue in The Telegraph.
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