Do they enlarge on selections from textbooks? (7)
I believe the answer is:
sermons
'textbooks?' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps you can see a link between them that I don't see?
'do they enlarge on selections from' is the wordplay.
I cannot quite see how this works, but
'on' is found in the answer.
'from' could be 'e' (I've seen this in other clues) and 'e' 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?
(Another definition for sermons that I've seen is " Homilies".)