Appear in birthday suit and risk boredom? (4,7,2)
I believe the answer is:
have nothing on
This clue is a double definition.
'appear in birthday suit' is the first definition.
(have no clothing on)
'risk boredom?' is the second definition.
(have nothing scheduled)
'and' acts as a link.
(Other definitions for have nothing on that I've seen before include "barely?" , "Be uncommitted" , "being out of gear?" , "like Gypsy Rose Lee ultimately" , "Be free" .)