(nautical) To remove, or fasten, all loose material, or partitions prior to a naval engagement. / (by extension, figuratively) To prepare for action.

Slash and burn (technique in agriculture where plant matter is roughly cut down and then burned over to prepare fields for the next crop)

a signal that danger, such as an air raid, is over; usually a siren at a single pitch / permission to proceed after obstacles have been removed

To remove all trees or vegetation from an area.

(idiomatic) Straightforward, obvious, simple, or basic. / (forestry) Having had all trees cut.

Alternative spelling of clear cut

To assuage a hostile situation.

A sign or signal indicating that a hindrance or danger is clear.

Having sharp vision. / Acutely perceptive or discerning; perspicacious.

(idiomatic) Completely clear and understood. / (idiomatic) Visually clear, a sharp image, high acuity.