Experience regret in Parisian street (3)
I believe the answer is:
rue
This clue is a double definition.
'experience regret' is the first definition.
(to rue something is to regret it)
'parisian street' is the second definition.
('street' in French)
'in' acts as a link.
(Other definitions for rue that I've seen before include "repentance" , "Deplore" , "Feel regret for the herb" , "Bitter-tasting herb" , "The 'herb of grace'" .)