Hearing; troublesome (6)
I believe the answer is:
trying
This clue is a double definition.
'hearing' is the first definition.
('try' can be a synonym of 'hear')
'troublesome' is the second definition.
(I've seen this before)
(Other definitions for trying that I've seen before include "responsibility of the first Baron Jeffreys of Wem" , "undertaking" , "work on bench" , "Doing one's best - annoying!" , "distressing" .)