One not suited for leisure activities (6)
I believe the answer is:
nudist
'one' is the definition.
Although both the answer and definition are adjectives, I cannot understand how they can define each other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for nudist that I've seen before include "he reveals all" , "One who sheds clothes in camp or on beach" , "One who disapproves of clothes" , "one whose barely seen" , "One not covered" .)