Ways for Edith Piaf to show regrets (4)
I believe the answer is:
rues
'regrets' is the definition.
('rue' can be a synonym of 'regret')
'ways for edith piaf' is the wordplay.
'ways' becomes 'es' (east and south - two directions).
'for' says to put letters next to each other (I've seen this in other clues).
'edith piaf' becomes 'ru' (I can't justify this - if you can you should give a lot more credence to this answer).
'es' after 'ru' is 'RUES'.
'to show' acts as a link.
Can you help me to learn more?
(Other definitions for rues that I've seen before include "Bemoans" , "Is sorry for - plants" , "Regrets, to be sure" .)