No lairds in Lake District will give access to concert (6)
I believe the answer is:
ticket
'no' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for ticket that I've seen before include "set of policies in US elections" , "Tag showing fare or fee" , "Party's election policies; label" , "Voucher, pass" , "Travel warrant" .)