Abroad, went out in old hat (8)
I believe the answer is:
outdated
'old hat' is the definition.
(I've seen this before)
'abroad went out' is the wordplay.
'abroad' becomes 'out' (I've seen this before).
'went out' becomes 'dated' (dating is a kind of going out).
'out'+'dated'='OUTDATED'
'in' is the link.
(Other definitions for outdated that I've seen before include "Obsolete, antiquated" , "Passe" , "old hat" , "Pass" , "Behind the times" .)