Bolt to move swiftly and directly (5)

I believe the answer is:

arrow

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'bolt' is the definition.
(I've seen this in another clue)

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

(Other definitions for arrow that I've seen before include "Arm" , "Missile in a quiver" , "Missile fired from bow" , "Weapon projectile" , "It may indicate" .)

I've seen this clue in The Sun.

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