Fixing pin; run away (4)

I believe the answer is:

bolt

I believe this clue is a double definition.

'fixing pin' is the first definition.
(I've seen this before)

'run away' is the second definition.
(I've seen this before)

(Other definitions for bolt that I've seen before include "Leave suddenly and in a hurry" , "Fasten - flee" , "for security reasons" , "Type of lightning" , "Sprint? Yes he does!" .)

I've seen this clue in The Times.

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