One vehicle towing another moving house (7)
I believe the answer is:
caravan
'one vehicle' is the definition.
(caravan is a kind of vehicle)
'towing another moving house' is the wordplay.
I cannot quite understand how this works, but
'another' could be 'car' (I've seen this in other clues) and 'car' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for caravan that I've seen before include "Group travelling together across a desert in single file" , "Holiday vehicle" , "Desert convoy" , "Towable home" , "Towed vehicle" .)