If you can see it wobbling, it won't explode (5)

I believe the answer is:

jelly

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'explode' is the definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?

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

Can you help me to learn more?

(Other definitions for jelly that I've seen before include "It wobbles" , "Wobbly food" , "Clear dessert" , "Gelatinous pudding" , "Aspic" .)

I've seen this clue in the Evening Standard.

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