Starting no end of terrible strife (5)
I believe the answer is:
first
'starting no' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?
'end of terrible strife' is the wordplay.
'end' indicates one should take the final letters.
'terrible strife' becomes 'irst' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The last letter of 'of' is 'f'.
'f'+'irst'='FIRST'
Can you help me to learn more?
(Other definitions for first that I've seen before include "Foremost" , "Coming before all others" , "In winning position" , "best" , "Top degree class" .)