A Republican ready with large cold port (9)
I believe the answer is:
archangel
'cold port' is the definition.
(city and port in Archangelsk oblast, Russia)
'a republican ready with large' is the wordplay.
'republican' becomes 'r' (abbreviation).
'ready' becomes 'change' (both can mean coins).
'with' means one lot of letters go next to another.
'large' becomes 'L' (eg in clothes sizes).
'a'+'r'+'change'+'l'='ARCHANGEL'
(Other definitions for archangel that I've seen before include "foreign port" , "Nag Rachel (anag.)" , "Port in northern Russia, or senior heavenly messenger" , "Russian city" , "Gabriel, for example" .)