Attempting to be troublesome? (6)
I believe the answer is:
trying
I believe this is a double definition.
'attempting' is the first definition.
('try' can be a synonym of 'attempt')
'troublesome?' is the second definition.
(I've seen this before)
'to be' acts as a link.
(Other definitions for trying that I've seen before include "Hard to endure" , "Causing strain, annoying" , "particularly awkward" , "Working in a court can be" , "Making an effort - it's irritating" .)