Diminutive insurgent leader (3)
I believe the answer is:
gen
'diminutive' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'insurgent leader' is the wordplay.
'GEN' is hidden in amongst the letters.
But, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for gen that I've seen before include "Info" , "Informal information" , "opening book, in short" , "Information yielded" , "Knowledge" .)