Slalom maneuver (3)
I believe the answer is:
ess
'slalom maneuver' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ess that I've seen before include "Alphabet letter" , "One next to tee" , "Nineteenth letter" , "Letter from Mid-West" , "Curvaceous letter" .)