Clearance

autorização

(permission to have access to sensitive or secret documents or other information)

autorização (de partida/viagem/etc.)

(permission for a vehicle to proceed, or for a person to travel)

clearance

(medicine: removal of harmful substances from the blood)

compensação

(finance: processing of payments at a clearing house)

espaço

(height or width of a passage, or the distance between a vehicle and the walls or roof of such passage)

folga

(distance between two moving objects)

limpa

(act of clearing or something cleared)

limpeza

(medicine: removal of harmful substances from the blood)

liquidação

(sale of merchandise at a reduced price)