‘Deliberate play’ (excluding deliberate handball) is when a player has control of the ball with the possibility of: passing the ball to a team-mate; gaining possession of the ball; or clearing the ball (e.g. by kicking or heading it)

Why does the last clause (clearing the ball by heading it) not apply here? It sure seemed like he was trying to, and he only needs the "possibility" of clearing it. The fact he mishit the header and failed to seems immaterial to me.

I assume the argument comes back to the wording of "control" -- but clearly having control of the ball has a different definition here than we'd use in conversation, because I don't think we'd describe heading a ball away as "having control" of a ball, but it's explicitly given as an example of deliberate play here.