Trial making sense? (7)
I believe the answer is:
This clue is a double definition.
'trial' is the first definition.
(as in a court hearing)
'sense?' is the second definition.
(hearing is a kind of sense)
'making' is the link.
(Other definitions for hearing that I've seen before include "Earshot; trial" , "Trying" , "Audition - trial" , "Trial before a judge" , "Her gain (anag.)" .)