Crossword Genius

They take shots of fish (8)

Ross

I believe the answer is:

snappers

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

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

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

Can you help me to learn more?

(Other definitions for snappers that I've seen before include "marine fish" , "They casually photograph" , "People photographing" .)

I've seen this clue in the Sydney Morning Herald.
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