Clue: Game girl tours part of the UK, a fabulous place (9)
Answer: RURITANIA
Explanation: Definition: fabulous place
The components of the wordplay are clear: RU (Rugby Union, 'game'), RITA ('girl'), NI (Northern Ireland, 'part of the UK') and 'a'; but 'tours' would seem to indicate an envelope, leaving A NI in the wrong order. I think the 'a' should be placed before 'part' in the clue. *See Crucible's comment @22.