Crossword Genius

Inside of freshwater fish eggs glow (9)


I believe the answer is:


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

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

'inside of freshwater fish eggs' is the wordplay.
I cannot quite understand how this works, but
'inside' could be 'in' and 'in' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Another definition for luminesce that I've seen is " Glow".)

I've seen this clue in The Independent.
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