Frosting missed, say, or caught (7)

I believe the answer is:

noticed

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'caught' is the definition.
The definition and answer can be both to do with perception as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for noticed that I've seen before include "regarded" , "Marked" , "Became aware of" , "Realised" , "Observed or saw" .)

I've seen this clue in The Daily Express.

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