Island resident's fight to retain passport? (6)
I believe the answer is:
friday
'island resident's fight to retain passport?' is the definition.
I can't judge whether this definition defines the answer.
'fight to retain passport?' is the wordplay.
'fight' becomes 'fray' (fray is a kind of fight).
'to retain' means one lot of letters goes inside another.
'passport?' becomes 'id' (a passport is identification).
'fray' going around 'id' is 'FRIDAY'.
Can you help me to learn more?
(Other definitions for friday that I've seen before include "One of seven" , "An islander" , "one of Chesterton's, so-called" , "Day named after a Norse goddess" , "twenty-four hours" .)