Clock sweeper (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
hand
'clock sweeper' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hand that I've seen before include "Crew member" , "Index" , "writing" , "Unit of equine measurement" , "Worker - four inches - bunch of bananas" .)