One man's name for extra-large wheels (5)
I believe the answer is:
oscar
'one man's name' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'extra-large wheels' is the wordplay.
'extra large' becomes 'os' (Over Size - library term for books).
'wheels' becomes 'car' (car wheel is a kind of wheel).
'os'+'car'='OSCAR'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for oscar that I've seen before include "Film industry award" , "letter read out on radio" , "Film acting award" , "Code word for O" , "Film statuette" .)