Post Office insanely resited for remote islander (10)
I believe the answer is:
polynesian
'remote islander' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'post office insanely resited' is the wordplay.
I cannot really see how this works, but
an anagram of 'insanely' is 'lynesian' which is located in the answer.
'post office' could be 'po' (abbreviation) and 'po' is found in the answer.
No letters remain.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for polynesian that I've seen before include "in relation to Hawaii" , "From a group of particular Pacific islands" .)