Not stopping to communicate (7)

I believe the answer is:

express

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'communicate' is the definition.
(I know that communicate is a more specific form of assure)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for express that I've seen before include "Out of papers" , "for a specific purpose?" , "Convey; particular; train" , "Squeeze out - speak" , "haste" .)

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

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