Bit of a bouncing boy in his birthday suit (6)
I believe the answer is:
unclad
'bit' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for unclad that I've seen before include "In one's birthday suit" , "having abandoned habit" , "nude" , "without clothing" , "Not dressed" .)