Rude about head of Venus bust (9)
I believe the answer is:
insolvent
'bust' is the definition.
(I've seen this before)
'rude about head of venus' is the wordplay.
'rude' becomes 'insolent' (I've seen this before).
'about' is an insertion indicator.
'head of' says to take the initial letters.
The first letter of 'venus' is 'v'.
'insolent' enclosing 'v' is 'INSOLVENT'.
(Other definitions for insolvent that I've seen before include "strapped for cash" , "on the rocks" , "Gone bust, without a bean" , "deep in debt?" , "gone to the wall" .)