Answer:

slick

Answer	Crossword Clue
SLICK	Unctuous
SLICK	Oil-spill formation
SLICK	Oily spot

SLICK	Clever
SLICK	Cleverly devised
SLICK	Glossy
SLICK	Oily
SLICK	Covered in ice or oil
SLICK	Sign of a spill
SLICK	Smooth and glossy
SLICK	Superficial

SLICK	Like a smooth talker
SLICK	Oil spill
SLICK	Fast-talking
SLICK	Like an ice-covered road
SLICK	Smooth-talking
SLICK	Crafty
SLICK	Ingenious
SLICK	Slippery.

SLICK	High-grade magazine: Slang.
SLICK	Glossy.
SLICK	Type of magazine.
SLICK	Ingenious.
SLICK	Spruce up.
SLICK	Oil on water.
SLICK	Smooth and shiny.
SLICK	Urbane

SLICK	Suave
SLICK	Deft
SLICK	Like a snake-oil salesman
SLICK	Rain-covered
SLICK	Like a recently waxed floor
SLICK	Like pomaded hair
SLICK	Cleverly crafted
SLICK	Alternative to "champ" or "sport"

SLICK	Oily driving hazard
SLICK	Adjective for a snake oil salesman
SLICK	Like a roadway after an ice storm
SLICK	Like oil on the floor
SLICK	Smooth