Does it wobble sweetly? (5)

I believe the answer is:

jelly

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'wobble sweetly?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

I can't explain the remainder of the clue.

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(Other definitions for jelly that I've seen before include "Semi-solid dessert" , "Wobbly sweet" , "Fruit-flavoured dessert" , "Solid dessert" , "Wobbly stuff" .)

I've seen this clue in the Evening Standard.

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