Crossword Genius

Became aware of being defrosted (7)

Ross

I believe the answer is:

noticed

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

'became aware of' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for noticed that I've seen before include "Marked" , "Became aware of" , "Clocked" , "Detected" , "Realised" .)

I've seen this clue in The Irish Independent.
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