Going west, protest about French road's condition (8)
I believe the answer is:
neuritis
'condition' is the definition.
(nervous condition)
'going west protest about french road's' is the wordplay.
'going west' is a reversal indicator.
'protest' becomes 'sit-in' (sit-in is a kind of protest).
'about' indicates putting letters inside.
'french road' becomes 'rue' ('road' or 'street' in French).
'sitin' placed around 'rue' is 'sitiruen'.
'sitiruen' reversed gives 'NEURITIS'.
(Other definitions for neuritis that I've seen before include "Inflammation of nerves" , "Inflammation of a nerve" , "cause of suffering" , "painful problem" , "Painful condition" .)