Eccentric English lord's first form of desert transport? (5)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

CAM (eccentric), E (English), L{ord} [’s first]. Collins: cam – a moving piece of machinery, as a wheel or projection on a wheel, that gives an eccentric rotation or a reciprocating motion to another wheel, a roller, a shaft, etc., or that receives such motion from it