Unconventional Olympian climbers potentially falling thus? (3,3,4)
I believe the answer is:
off the wall
'unconventional' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for off the wall that I've seen before include "Mad" , "Berliners once had to keep this" , "description of peeling plaster?" , "Grossly unconventional" , "Strange" .)