Part with not a word about what happened (7)
I believe the answer is:
seventh
'part' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'not a word about what happened' is the wordplay.
'not a word' becomes 'sh'.
'about' is an insertion indicator.
'what happened' becomes 'event' (I've seen this in another clue).
'sh' enclosing 'event' is 'SEVENTH'.
'with' is the link.
Can you help me to learn more?
(Other definitions for seventh that I've seen before include "This heaven is the most exalted state of happiness" , "In this heaven, one is ecstatic" , "This son of another is said to be a healer" , "Position of Judges in Old Testament" , "after six" .)