Controversial dropping votes in round-up (6)
I believe the answer is:
corral
If this is the answer I cannot explain how the clue works.
Can you help me to learn more?
(Other definitions for corral that I've seen before include "An enclosure for horses or cattle" , "Western horse enclosure" , "Pen for livestock (US)" , "Livestock enclosure" , "Pen for cattle - ring of waggons" .)