Cardinal: one less impressed by fine English (4)
I believe the answer is:
five
'cardinal one' is the definition.
The definition and answer can be both quantities as well as being singular nouns.
I also know that 'cardinal' relates to this answer.
'less impressed by fine english' is the wordplay.
'less' becomes 'iv' (I can't explain this - if you can you should believe this answer much more).
'impressed by' indicates putting letters inside.
'fine' becomes 'f' (abbreviation).
'english' becomes 'e' (abbreviation).
'f'+'e'='fe'
'iv' put inside 'fe' is 'FIVE'.
Can you help me to learn more?
(Other definitions for five that I've seen before include "Prime number" , "taken for the rest of the musicians" , "Cardinal" , "Top-quality hotel has these stars" , "End of the working day?" .)