Give the impression, as you walk out (6)

I believe the answer is:

strike

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'walk out' is the definition.
(I know that walk out can be written as strike)

I can't explain the rest of the clue.

(Other definitions for strike that I've seen before include "Make a sudden large financial gain" , "Hit; cancel" , "Work stoppage over industrial dispute" , "Industrial dispute - it's a blow" , "Hit sharply" .)

I've seen this clue in the Evening Standard.

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