clearance

The act of clearing or something (such as a space) cleared.

In conclusion, it must be reiterated that effective snow clearance is largely a matter of forward planning and departmental co-operation.

The distance between two moving objects, especially between parts of a machine

The height or width of a tunnel, bridge or other passage, or the distance between a vehicle and the walls or roof of such passage; a gap, headroom.

When the scheme is completed, the 99-year-old swing bridge over the canal will be dispensed with as the new bridge will have sufficient height to allow clearance for the passage of canal traffic.

To obtain the required overhead clearance at Stockport, it will be necessary to open out the Edgeley tunnels.

A permission for a vehicle to proceed, or for a person to travel.

The plane got clearance from air traffic control, and we were off.

He got clearance to travel to America, even though he had previous links to terrorists.

A permission to have access to sensitive or secret documents or other information.

In a thread called “Calm Before the Storm”, and in subsequent posts, Q established his legend as a government insider with top security clearance who knew the truth about a secret struggle for power involving Donald Trump, the “deep state”, Robert Mueller, the Clintons, pedophile rings, and other stuff.