Crossword Genius

With which big cat sees gemstone (5-3)

Ross

I believe the answer is:

tiger-eye

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

'with' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'big cat sees gemstone' is the wordplay.
'big cat' becomes 'tiger' (tiger is a kind of big cat).
'sees gemstone' becomes 'eye' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'tiger'+'eye'='TIGER-EYE'

'which' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.