Game girl tours part of the UK, a fabulous place (9)
I believe the answer is:
ruritania
'fabulous place' is the definition.
(fictional country in novels by Anthony Hope)
'game girl tours part of the uk a' is the wordplay.
'game' becomes 'RU' (rugby union).
'girl tours' becomes 'rita' (I can't explain this - if you can you should believe this answer much more).
'part of the uk' becomes 'NI' (Northern Ireland).
'ru'+'rita'+'ni'+'a'='RURITANIA'
(Other definitions for ruritania that I've seen before include "RA Air Unit (anag.)" , "world of romance?" , "Fictional land of romance" , "Hope country" , "romantic situation" .)