Crossword Genius

Commentator's spotted a spinner (6)

Ross

I believe the answer is:

spider

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

'spinner' is the definition.
(a spider spins webs)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for spider that I've seen before include "A crawler" , "Bathtub intruder - snooker rest" , "Eight-legged webmaster?" , "Insect-eater" , "Prised out the 8-legged creature" .)

I've seen this clue in The Sun and The Telegraph.
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