Online friend entering part of the UK, Asian national (6)
I believe the answer is:
nepali
'asian national' is the definition.
(I've seen this before)
'online friend entering part of the uk' is the wordplay.
'online' becomes 'e' (as in e-mail or e-commerce).
'friend' becomes 'pal' (pal is a kind of friend**).
'entering' indicates putting letters inside.
'part of the uk' becomes 'ni' (Northern Ireland).
'e'+'pal'='epal'
'epal' inserted into 'ni' is 'NEPALI'.
(Other definitions for nepali that I've seen before include "One from Katmandu" , "Native of one Himalayan state" , "Native of a mountainous Hindu kingdom" , "one found in mountainous region" , "Language of Kathmandu" .)