Expression of surprise about publication in town west of Belfast (5)
I believe the answer is:
omagh
'town west of belfast' is the definition.
I can't tell whether this definition defines the answer.
'expression of surprise about publication' is the wordplay.
'expression of surprise' becomes 'oh'.
'about' means one lot of letters goes inside another.
'publication' becomes 'mag' (abbreviation for magazine).
'oh' placed around 'mag' is 'OMAGH'.
'in' is the link.
Can you help me to learn more?
(Other definitions for omagh that I've seen before include "Main town of County Tyrone" , "N. Irish town, district" , "NI town" , "Ulster town" , "Town in Northern Ireland" .)