Crossword Genius

Metalworker requires light mods to be re-tweaked (9)

Ross

I believe the answer is:

goldsmith

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

'metalworker' is the definition.
(I know that goldsmith is a type of metalsmith)

'light mods to be re-tweaked' is the wordplay.
'light mods' can be anagrammed to 'GOLDSMITH'.
However, I'm not clear how the anagram is indicated.

'requires' is the link.

Can you help me to learn more?

(Other definitions for goldsmith that I've seen before include "Precious metal worker" , "Benvenuto Cellini was one" , "Irish novelist" , "artisan worker" , "his output precious?" .)

I've seen this clue in The Times.
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