He comes from Constantinople - or Istanbul (4)
I believe the answer is:
stan
'he' is the definition.
'from constantinople or istanbul' is the wordplay.
'STAN' is hidden in amongst the letters.
However, I'm uncertain how this is indicated.
'comes' acts as a link.
Can you help me to learn more?
(Other definitions for stan that I've seen before include "guy" , "- Getz, jazz musician" , "Laurel and Hardy, . . . . and Ollie" , "- Laurel, Hardy's partner" , "One of the comic duo" .)