Some traffic directors (5)
I believe the answer is:
cones
'some traffic directors' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cones that I've seen before include "Dry fruits of evergreen trees" , "They taper from a circular base to a point" , "Shapes of wafers for ice-cream" , "Cornets" , "Shapes with circular base and tapering sides" .)