Cockney's diminutive boss (3)
I believe the answer is:
guv
This might be a double definition.
'cockney's' is the first definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I can't see?
'diminutive boss' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for guv that I've seen before include "Sir" , "Boss (inf.)" .)