Regret the way of Napoleon (3)
I believe the answer is:
rue
This might be a double definition.
'regret' is the first definition.
(to rue something is to regret it)
'way of napoleon' is the second definition.
'rue' can be an answer for 'way' (I have seen 'French way' mean 'rue' so perhaps 'way' could also mean 'rue'). I'm not sure about the 'of napoleon' bit.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for rue that I've seen before include "Repentant sort of shrub?" , "Feel bad" , "Regret or repent" , "Lament; a herb" , "The 'herb of grace'" .)