Is amazed and angry, caught up in the snowdrift (7)

I believe the answer is:

wonders

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'is' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot understand how one could define the other.

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

Can you help me to learn more?

(Other definitions for wonders that I've seen before include "Questons, marvels" , "Marvels - there used to be seven of them in the world" , "Curiosities" , "Prodigies, miracles" , "Questions, marvels" .)

I've seen this clue in the Evening Standard.

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