Aerobics platform (4)
I believe the answer is:
step
(Other definitions for step that I've seen before include "Gradation" , "Measure - pace" , "Pace; foothold" , "Abrupt change; pace" , "'Stage, rung (4)'" .)
I believe the answer is:
step
(Other definitions for step that I've seen before include "Gradation" , "Measure - pace" , "Pace; foothold" , "Abrupt change; pace" , "'Stage, rung (4)'" .)