One's alight, turning on Jamaican? (8)
I believe the answer is:
islander
'jamaican?' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'one's alight turning on' is the wordplay.
'one's' becomes 'i's' (Roman numeral).
'alight' becomes 'land' (I've seen this before).
'turning' says the letters should be written backwards.
'on' becomes 're' (regarding).
're' reversed gives 'er'.
'is'+'land'+'er'='ISLANDER'
Can you help me to learn more?
(Other definitions for islander that I've seen before include "Perhaps Sardinian" , "Samoan, maybe" , "Manxman, maybe," , "Rum person perhaps" , "Person inhabiting Aran, say" .)