Wacky little throne? (5)
I believe the answer is:
potty
I believe this clue is a triple definition!
'wacky' is the first definition.
(thesaurus)
'little' is the second definition.
(thesaurus)
'throne?' is the third definition.
(I know that throne can be written as potty)
(Other definitions for potty that I've seen before include "Infant's loo" , "Where youngster goes" , "Bonkers" , "Where kids go" , "Mad" .)