
1) Auto part
Found on
https://www.crosswordclues.com/clue/crossmember

A crossmember is a structural section, usually of steel, usually boxed, that is bolted across the underside of a monocoque / unibody motor vehicle, to support the internal combustion engine and / or transmission. For the suspension of any car to operate as it should, for proper handling, and to keep the body panels in alignment, the frame has to b...
Found on
http://en.wikipedia.org/wiki/Crossmember

One of several horizontal members in a vehicle frame which join the side members and add to overall strength and stability.
Found on
https://www.encyclo.co.uk/local/22334
No exact match found.