Like a Scot, or possibly Japanese (5)
I believe the answer is:
asian
'possibly japanese' is the definition.
(I know that Japanese is a type of Asian)
'like a scot' is the wordplay.
'like' becomes 'as'.
'a scot' becomes 'ian' (Scottish given name).
'as'+'ian'='ASIAN'
'or' acts as a link.
(Other definitions for asian that I've seen before include "someone from abroad?" , "One from big continent" , "from way outside the UK" , "From large continent" , "Artistically florid" .)