Clearance
A clearance move vacates a square, file, rank, or diagonal so another piece can use it.
What to look for
Find your own piece blocking an important line or square. The tactic often starts by moving it with tempo.
Recognize the mechanism
Identify the square or line your own piece is blocking. Then choose a useful way to vacate it so another piece can use the newly available space. A move with tempo may prevent the defender from reorganizing.
Common practical mistake
Do not confuse clearing your own blocker with interfering in the opponent’s defensive line. Check who benefits from the line becoming open.
Training goal
Recognize when the best move is to get out of the way.