Rickety train touring a European city (6)
I believe the answer is:
tirana
'european city' is the definition.
(capital of Albania)
'rickety train touring a' is the wordplay.
'rickety' indicates an anagram.
'touring' is an insertion indicator (touring can mean going round).
'train' anagrammed gives 'tirna'.
'tirna' placed around 'a' is 'TIRANA'.
(Other definitions for tirana that I've seen before include "Albanian capital" , "capital city" , "foreign capital" , "Take a train to Albania's capital (6)" , "Take a train to the capital of Albania" .)