How Jack walked? (8)

I believe the answer is:

lumbered

I'm a little stuck... Click here to teach me more about this clue!

'walked?' is the definition.
(lumbering is a kind of walking)

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

(Other definitions for lumbered that I've seen before include "Stuck (with)" , "loaded" , "Plodded along" , "Burdened with unwanted responsibility" , "Moved clumsily in dumb reel" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.