In this Greek classic, the Italian gets a Welshman upset (5)
I believe the answer is:
iliad
'in this greek classic' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'the italian gets a welshman upset' is the wordplay.
'the italian' becomes 'il' ('the' in Italian).
'gets' means one lot of letters go next to another.
'a welshman' becomes 'dai' (Welsh name).
'upset' says the letters should be written in reverse.
'dai' in reverse letter order is 'iad'.
'il'+'iad'='ILIAD'
Can you help me to learn more?
(Other definitions for iliad that I've seen before include "literary work" , "Homer's great poem" , "Greek epic poem describing the siege of Troy" , "Homer's epic poem on the siege of Troy" , "set of books" .)