| Answer | Crossword Clue |
|---|---|
| OILED | Like a smooth-running machine |
| OILED | Like smooth-running machines |
| LUBED | Like smooth-running engines |
| MOTOROIL | Necessity for a smooth-running car. |
| ONAUTO | Running by itself, as a machine |
| SUAVE | Like a smooth operator |
| STONELESS | Like a smooth riverbed |
| GLIB | Like a smooth talker |
| CLEAN | Like a smooth getaway |
| SLICK | Like a smooth talker |
| SHAVEN | Like a smooth head, perhaps |
| SLEEK | Like a smooth-sailing clipper ship |
