Film of oil on water (5)
I believe the answer is:
slick
(Other definitions for slick that I've seen before include "Glibly assured" , "Bedeck" , "polished performance" , "Smooth" , "Sleek - film of oil" .)
I believe the answer is:
slick
(Other definitions for slick that I've seen before include "Glibly assured" , "Bedeck" , "polished performance" , "Smooth" , "Sleek - film of oil" .)