Person from Cairo damaging a tiny peg (8)
I believe the answer is:
egyptian
'person from cairo' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe there's a link between them I don't understand?
'damaging a tiny peg' is the wordplay.
'damaging' indicates an anagram.
'a'+'tiny'+'peg'='atinypeg'
'atinypeg' anagrammed gives 'EGYPTIAN'.
Can you help me to learn more?
(Other definitions for egyptian that I've seen before include "Mummy" , "One from Suez" , "Strange tiny page for the nationality" , "Eg, native of Cairo" , "Nationality of a Pharaoh" .)