Stride towards fate in Davy Jones’s locker? (4,3,5)

I believe the answer is:

walk the plank

(Other definitions for walk the plank that I've seen before include "Suffer fate imposed by pirates" , "Be forced over the side of a pirate ship" , "Leave the ship as punishment!" , "One way to leave a pirate ship for ever?" .)

I've seen this clue in The Guardian.

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