A cup can be said to contain five (5)

I believe the answer is:
davis
'a cup' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I don't see?
'can be said to contain five' is the wordplay.
'can be' is an anagram indicator.
'to contain' indicates putting letters inside.
'five' becomes 'V' (Roman numeral).
'said' anagrammed gives 'dais'.
'dais' going around 'v' is 'DAVIS'.
Can you help me to learn more?
(Other definitions for davis that I've seen before include "Bette --; Miles --" , "Miles, perhaps" .)
