One is said to see such a view (3)
I believe the answer is:
sea
'one' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'said to see such a view' is the wordplay.
'said' shows a homophone (sound like).
'to see such a view' becomes 'see' (synonyms).
'see' is a homophone of 'SEA'.
'is' is the link.
Can you help me to learn more?
(Other definitions for sea that I've seen before include "The drink" , "Large body of salt water" , "Great expanse of water" , "Large expanse of water" , "E.g. Baltic" .)