Norm is a skinflint (4)
I believe the answer is:
mean
'norm' is the definition.
(I know that mean is a type of norm)
'a skinflint' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is present in the answer.
The remaining letters 'me' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'is' acts as a link.
Can you help me to learn more?
(Other definitions for mean that I've seen before include "Signify; miserly" , "Intend; stingy" , "Import" , "intimate" , "The average could be miserly" .)