Neat, adopting Indonesian island’s loyalty to race (9)
I believe the answer is:
tribalism
'loyalty to race' is the definition.
I can't tell whether this defines the answer.
'neat adopting indonesian island's' is the wordplay.
'neat' becomes 'trim' (synonyms).
'adopting' indicates putting letters inside (inserted letters are taken on or adopted).
'indonesian island's' becomes 'Bali's' (island of Indonesia).
'trim' placed around 'balis' is 'TRIBALISM'.
Can you help me to learn more?
(Other definitions for tribalism that I've seen before include "divisive tendency" , "clan system" , "Failure to transcend clan loyalty" , "Organisation of society on ethnic lines" , "Strong group loyalty" .)