What might be issue for children? (7)
I believe the answer is:
synonym
'issue for children?' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for synonym that I've seen before include "Substitute brought in for a term" , "Alternative word" , "Quick crossword clue" , "My sonny (anag)" , "Word that can be exchanged for another" .)