City on the Liffey (6)
I believe the answer is:
dublin
'city on the liffey' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dublin that I've seen before include "Irish capital city" , "Ulysses city (Joyce)" , "City on the Liffey" , "European capital" , "Capital of Ireland" .)