Busts are wobbling beyond comprehension (8)
I believe the answer is:
abstruse
'beyond comprehension' is the definition.
I can't tell whether this defines the answer.
'busts are wobbling' is the wordplay.
'wobbling' is an anagram indicator.
'busts'+'are'='bustsare'
'bustsare' with letters rearranged gives 'ABSTRUSE'.
Can you help me to learn more?
(Other definitions for abstruse that I've seen before include "Difficult to penetrate or understand" , "Obscure or recondite" , "Difficult to understand, obscure" , "Hard to understand, perhaps profound" , "Difficult to comprehend" .)