No good pressing them, as it's what you'd expect from poor loser (4,6)
I believe the answer is:
sour grapes
'no' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'good pressing them as it's what you'd expect from poor loser' is the wordplay.
I cannot quite understand how this works, but
'good' could be 'g' (abbreviation) and 'g' is found within the answer.
'as' could be 'so' (I've seen this in other clues) and 'so' is located in the answer.
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for sour grapes that I've seen before include "with a bitter aftertaste?" , "Belittlement" , "Disparagement of something one can't have oneself" , "Disparagement of something one wants but cannot attain" , "Jealous resentment" .)