Hearing sounds coming back carrying son (7)
I believe the answer is:
session
'hearing' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for session that I've seen before include "Period devoted to an activity" , "Period spent on a single activity" , "Meeting, of a court say" , "Hearing, sitting" , "Meeting, sitting, term" .)