Tell Roy to move wheeled cart (7)
I believe the answer is:
trolley
'wheeled cart' is the definition.
(I've seen this before)
'tell roy to move' is the wordplay.
'to move' indicates an anagram.
'tell'+'roy'='tellroy'
'tellroy' is an anagram of 'TROLLEY'.
(Other definitions for trolley that I've seen before include "Supermarket vehicle" , "Shopping vehicle" , "Wheeled handcart" , "American tram or supermarket purchases carrier" , "Refreshments off this" .)