Older egg tossed in trash (8)
I believe the answer is:
doggerel
'trash' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'older egg tossed' is the wordplay.
'tossed' indicates an anagram.
'older'+'egg'='olderegg'
'olderegg' anagrammed gives 'DOGGEREL'.
'in' is the link.
Can you help me to learn more?
(Other definitions for doggerel that I've seen before include "Poor quality comic or trivial verse" , "Verse lacking artistry" , "Very bad poetry or verse" , "Terrible poetry" , "Rubbishy verse" .)