Give a chap a little light reading (8)
I believe the answer is:
handbill
'a little light reading' is the definition.
The definition and answer 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?
'give a chap' is the wordplay.
'give' becomes 'hand' (synonyms).
'a chap' becomes 'bill' (short for William).
'hand'+'bill'='HANDBILL'
Can you help me to learn more?
(Other definitions for handbill that I've seen before include "notice" , "Small advert" , "Hill band (anag)" .)