Add to the rash of escapes? (5,3)

I believe the answer is:

break out

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

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

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(Other definitions for break out that I've seen before include "Escape from jail" , "Start suddenly; escape (from prison)" , "Appear suddenly - escape" .)

I've seen this clue in The Globe and Mail.

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