Oily substance (6)
I believe the answer is:
grease
(Other definitions for grease that I've seen before include "'Thick, fatty oil (6)'" , "Lubricate (-ant)" , "Possible cause of slip-up" , "bribe" , "Rock musical" .)
I believe the answer is:
grease
(Other definitions for grease that I've seen before include "'Thick, fatty oil (6)'" , "Lubricate (-ant)" , "Possible cause of slip-up" , "bribe" , "Rock musical" .)