Keep one, drop one

Kills efficiently

efficiently regulated

Regulated excessively

Excessively tired.

Tired excuse

Excuse generator.

Generator winding

Winding road

Road trip!

Trip wire

Wire Brush.

Brush painted

Painted desert.

Painted Lady

Desert sand.

Sand dune

Dune buggy.

Buggy Whip.

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Whip cream.

Cream pie