Alternative to roundabouts! (6)
I believe the answer is:
swings
(Other definitions for swings that I've seen before include "Pieces of playground equipment" , "What you lose on these, you hopefully gain on the roundabouts" , "Moves back and forth or from side to side while suspended" , "What you might lose on them, you could gain on the roundabouts" , "Moves in a curve" .)