Skier's turn (8)
I believe the answer is:
'skier's turn' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for telemark that I've seen before include "sudden turn on snow" , "Skiing manoeuvre" , "where hydro-plant destroyed" , "Meet Karl (anag) - turn in skiing" , "A turn made in skiing" .)