Support (very Parisian) inserted in wobbly bust (8)
I believe the answer is:
buttress
'support' is the definition.
(buttress is a kind of support)
'very parisian inserted in wobbly bust' is the wordplay.
'very parisian' becomes 'tres' ('very' in French).
'inserted in' is an insertion indicator.
'wobbly' indicates an anagram (I've seen this in other clues).
'bust' with letters rearranged gives 'buts'.
'tres' placed inside 'buts' is 'BUTTRESS'.
(Other definitions for buttress that I've seen before include "Wall supporter" , "support for Notre Dame?" , "Projecting support for building" , "strengthening side" , "Stone support" .)