Over-the-top luggage holder? (4,4)

I think it could be either:

Which length description are you looking for?:

4,4

roof rack

(Other definitions for roof rack that I've seen before include "Overhead luggage carrier" , "Carrier for holding luggage on top of a car" , "Frame" , "Framework for carrying luggage on top of car" , "Attachment to car" .)

I've seen this clue in The Guardian.

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