U-Haul renter (5)
I believe the answer is:
mover
'u-haul renter' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mover that I've seen before include "Instigator, organiser" , "Someone who proposes a motion for debate" , "One who is in motion - may also be a shaker" , "someone who brings forward proposal" , ". . . . . and shaker, he or she wields power and influence" .)