Like many a mechanic's rag (4)
I believe the answer is:
oily
(Other definitions for oily that I've seen before include "Unpleasantly ingratiating" , "Smoothly ingratiating" , "Viscous" , "Like a lot of fish" , "Smooth; like lubricant" .)
I believe the answer is:
oily
(Other definitions for oily that I've seen before include "Unpleasantly ingratiating" , "Smoothly ingratiating" , "Viscous" , "Like a lot of fish" , "Smooth; like lubricant" .)