Used by back-seat drivers? (7)

I believe the answer is:

saddles

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

'drivers?' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps there's a link between them I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for saddles that I've seen before include "Burdens" , "Jockeys' seats" , "Riders' seats" , "Seats for horses" , "Riding seats" .)

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.