Write (or leave) quickly (4,3)

I believe the answer is:

dash off

This clue is a double definition.

'write' is the first definition.
(I know that dash off is a type of write)

'leave quickly' is the second definition.
(I've seen this in another clue)

(Another definition for dash off that I've seen is " Rush away".)

I've seen this clue in The Guardian.

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