Some poured diesel on troubled waters (6)
I believe the answer is:
eddies
'troubled waters' is the definition.
(I've seen this before)
'some poured diesel on' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'EDDIES' is hidden within 'poured diesel on'.
(Other definitions for eddies that I've seen before include "opposed to current trends" , "current affairs?" , "Turbulent movements" , "troubled waters" , "current disturbances" .)