Holiday island where I party after going back (4)
I believe the answer is:
bali
'holiday island' is the definition.
(Bali is a popular holiday destination)
'i party after going back' is the wordplay.
'party' becomes 'lab' (abbreviation for Labour).
'after' means one lot of letters go next to another.
'going back' says the letters should be written in reverse.
'i'+'lab'='ilab'
'ilab' in reverse letter order is 'BALI'.
'where' is the link.
(Other definitions for bali that I've seen before include "Holiday island to the east of Java" , "Indonesian island, east of Java" , "Indonesian holiday destination" , "Bail out of the island" , "Javanese island" .)