Girl's sanctimonious, right? It brings dismay (8)
I believe the answer is:
dispirit
'dismay' is the definition.
('dispirit' can be a synonym of 'dismay')
'girl's sanctimonious right? it' is the wordplay.
'girl's' becomes 'dis'.
'sanctimonious' becomes 'pi'.
'right?' becomes 'r' (common abbreviation).
'dis'+'pi'+'r'+'it'='DISPIRIT'
'brings' is the link.
(Other definitions for dispirit that I've seen before include "Cause to lose hope" , "Weigh" , "Cause to feel low or depressed" , "Make hopeless" , "Discourage" .)