Time to give back travel permit (3,6)
I believe the answer is:
day return
'travel permit' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?
'time to give back' is the wordplay.
'time' becomes 'day' (day is a kind of time).
'to' is a charade indicator (letters next to each other).
'give back' becomes 'return' (synonyms).
'day'+'return'='DAY-RETURN'
Can you help me to learn more?
(Other definitions for day return that I've seen before include "cheap ticket" , "There-and-back short-term ticket" , "Type of ticket" .)