One clog split in European city (7)
I believe the answer is:
cologne
'european city' is the definition.
(city in Germany)
'one clog split' is the wordplay.
'split' is an anagram indicator (letters split up and reassembled).
'one'+'clog'='oneclog'
'oneclog' is an anagram of 'COLOGNE'.
'in' acts as a link.
(Other definitions for cologne that I've seen before include "European city" , "German river port" , "Perfumed liquid made of oils and alcohol" , "Refreshing scent" , "Scent - German city" .)