Crossword Genius

Who pulls strings when attempting to hit targets? (6)

Ross

I believe the answer is:

archer

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'who' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

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

Can you help me to learn more?

(Other definitions for archer that I've seen before include "Missile launcher" , "man with weapon" , "stars" , "Character in radio series" , "Arrows one sends" .)

I've seen this clue in The Telegraph.
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