Vale on borders of Cymru, reportedly? (3,3)
I believe the answer is:
see you
'vale' is the definition.
('vale' is an archaic way of saying goodbye)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for see you that I've seen before include "Informal kind of au revoir - with visual intent" , "poker-playing expression?" , "Cheers" , "Later we'll meet" , "Casual and informal goodbye" .)