Revolving (8)
'revolving' is the definition.
('rotate' can be a synonym of 'revolve')
This is the entire clue.
(Other definitions for rotating that I've seen before include "in circulation" , "taking turns" , "Turning on an axis" , "Turning around as on a spindle" , "Going around" .)
(Other definitions for door that I've seen before include "Moveable structure at an entrance" , "Means of exit and entrance" , "Threshold" , "Portal" , "Usual entrance" .)
'revolving' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rotary that I've seen before include "Moving in a circle" , "Gyratory" , "International club" , "Spinning" , "Circular motion" .)