Crossword Genius

Submit Instagram review on metal deposit (4,2)

Ross

I believe the answer is:

give in

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

'submit' is the definition.
(synonyms)

'instagram review on metal deposit' is the wordplay.
I cannot really understand how this works, but
'metal' could be 'in' (In is an example) and 'in' is found within the answer.
The remaining letters 'give' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for give in that I've seen before include "Cease fighting" , "Surrender informally" , "Yield in argument" , "Yield, accede" , "Surrender, cease to resist" .)

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