Break into a politician's address (6)

I believe the answer is:

heckle

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'break' is the definition.

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

(Other definitions for heckle that I've seen before include "Jeer abusively" , "Barrack speaker" , "Verbally interrupt performer" , "Shout from the audience" , "rudely interrupt" .)

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

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