A way for France to show regret (3)
I believe the answer is:
rue
I believe this clue is a double definition.
'a way for france' is the first definition.
('street' in French)
'show regret' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for rue that I've seen before include "Feel sorry" , "Fish eggs" , "Feel remorse" , "Regret - wild shrub" , "Swann's way?" .)