Held up by a railway in the country (7)
I believe the answer is:
hungary
'country' is the definition.
(Hungary is an example)
'held up by a railway' is the wordplay.
'held up' becomes 'hung' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'by' is a charade indicator (letters next to each other).
'railway' becomes 'ry' (abbreviation).
'hung'+'a'+'ry'='HUNGARY'
'in the' is the link.
Can you help me to learn more?
(Other definitions for hungary that I've seen before include "part of Europe" , "country in Europe" , "Country bordered by Slovakia, Ukraine, Romania, Serbia, Croatia, Slovenia and Austria" , "Country where Magyar is spoken" , "Liszt's land" .)