Crossword Genius

One having party back in holiday island (4)

Ross

I believe the answer is:

bali

'holiday island' is the definition.

'one having party back' is the wordplay.
'one' becomes 'i' (Roman numeral**).
'having' means one lot of letters go next to another.
'party' becomes 'lab' (abbreviation for Labour).
'back' says the letters should be written in reverse.
'i'+'lab'='ilab'
'ilab' in reverse letter order is 'BALI'.

'in' is the link.

(Other definitions for bali that I've seen before include "Island in Indonesia" , "Indonesian island, east of Java" , "Bail out of the island" , "Holiday island to the east of Java" , "mountainous island" .)

I've seen this clue in The Independent.
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