Name on island for Ulster bus stations (7)
I believe the answer is:
termini
'bus stations' is the definition.
(I've seen this before)
'name on island for ulster' is the wordplay.
'name' becomes 'term' (both can mean a word for something).
'on' is a charade indicator (letters next to each other).
'island' becomes 'i' (geographical abbreviation).
'for' says to put letters next to each other.
'ulster' becomes 'NI' (Northern Ireland).
'term'+'i'+'ni'='TERMINI'
(Other definitions for termini that I've seen before include "Rail stations mainly in city centres" , "Interim (anag.)" , "limits of service" , "Ends, extremities" , "Finishing points" .)