Delivery from Ismailia (4)
I believe the answer is:
'delivery' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'from ismailia' is the wordplay.
'from' says the answer is hidden in the clue.
'MAIL' is hidden within 'ismailia'.
Can you help me to learn more?
(Other definitions for mail that I've seen before include "Letters - armour" , "Chain armour" , "Armour of interlinked metal rings" , "Send message" , "Dispatch - armour" .)