Where you'll see ducks around the harbour? (6)
I believe the answer is:
oporto
'where you'll' is the definition.
The definition suggests a singular noun which matches the answer.
'ducks around the harbour?' is the wordplay.
'ducks' becomes 'OO' (OO resembles two zeroes or 'ducks' in cricket).
'around' means one lot of letters goes inside another.
'the harbour?' becomes 'port' (harbour is a kind of port).
'oo' placed around 'port' is 'OPORTO'.
'see' acts as a link.
Can you help me to learn more?
(Other definitions for oporto that I've seen before include "Iberian location" , "Second largest city in Portugal" , "Portuguese wine city" , "Wine city in Portugal" , "foreign place" .)