Troublemaker finishing, coming any minute? (9)
I believe the answer is:
impending
'coming any minute?' is the definition.
(impending means on the way)
'troublemaker finishing' is the wordplay.
'troublemaker' becomes 'imp' (I've seen this before).
'finishing' becomes 'ending' ('end' can be a synonym of 'finish').
'imp'+'ending'='IMPENDING'
(Other definitions for impending that I've seen before include "Looming" , "coming?" , "Threatening" , "About to happen" .)