Merry-go-round — 1945 Rodgers and Hammerstein stage musical (8)
I believe the answer is:
carousel
(Other definitions for carousel that I've seen before include "Conveyer belt for arriving air travellers' luggage" , "A closure (anag.)" , "Luggage conveyor belt and fairground ride" , "Musical, roundabout" , "Rotating conveyor" .)