English saint, but foreign to Ian! (5)
I believe the answer is:
alban
'english saint' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for alban that I've seen before include "Hertfordshire saint" , "Ancient Scottish kingdom" , "-- Berg, composer" , "First English Christian martyr" , "early martyr" .)