Bridge in Venice and Dublin (6)
I believe the answer is:
rialto
'bridge in venice and dublin' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for rialto that I've seen before include "Area famous for 7 [ABRIDGE]" , "exchange" , "Bridge in Venice and Dublin" , "Dublin district, or Shakespeare's 'What news on the . . . . . .?'" , "Old market" .)