Equipment changed on the road (4)

I believe the answer is:

gear

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

'equipment' is the definition.
(gear is a kind of equipment)

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

(Other definitions for gear that I've seen before include "Clothing - tackle" , "Toothed wheel mechanism" , "Unusually good" , "Toothed wheel and youthful fashion" , "Equipment; car mechanism" .)

I've seen this clue in The Globe and Mail.

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.