Regret it's a way of the French (3)
I believe the answer is:
rue
This clue is a double definition.
'regret' is the first definition.
(to rue something is to regret it)
'a way of the french' is the second definition.
('street' in French)
'it's' is the link.
(Other definitions for rue that I've seen before include "Bemoan" , "Feel remorse" , "Feel regret for the herb" , "Feel sorry" , "repentance" .)