Hot-looking athlete or climber (7,6)
I believe the answer is:
scarlet runner
'climber' is the definition.
(I've seen this before)
'hot-looking athlete' is the wordplay.
'hot looking' becomes 'scarlet' (I can't explain this - if you can you should believe this answer much more).
'athlete' becomes 'runner' (type of athlete).
'scarlet'+'runner'='SCARLET-RUNNER'
'or' acts as a link.
Can you help me to learn more?
(Other definitions for scarlet runner that I've seen before include "Flushed athlete" , "one to train on the pole in garden" , "Variety of bean" , "trained climber in garden" , "one going up the pole" .)