Crossword Genius

Tiny particle, or two fragments of iron (3)

Ross

I believe the answer is:

ion

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

'tiny particle' is the definition.
(I've seen this in another clue)

'two fragments of iron' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is present in the answer.
The remaining letters 'in' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'or' acts as a link.

Can you help me to learn more?

(Other definitions for ion that I've seen before include "Subatomic particle" , "Eletrically charged particle" , "Electrically charged atom or group of atoms" , "Electrically charged particle" , "Electrically-charged particle" .)

I've seen this clue in the Evening Standard.
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.