Port on a bend in the Tiber, as one might see (6)
I believe the answer is:
beirut
'port' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'bend in the tiber as one might see' is the wordplay.
I cannot quite see how this works, but
'bend' could be 'u' (a U-bend is a kind of bend - pipe under sink) and 'u' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'on a' acts as a link.
Can you help me to learn more?
(Other definitions for beirut that I've seen before include "Capital city of Lebanon" , "Capital of 21 across" , "Middle East capital" , "Lebanon's capital" , "Lebanese capital" .)