How does Zap work in "Chameleon the game"?
It seems that this version of Chameleon the Game is an English reprint of a French game called Le Chameleon.
Unfortunately the Australian company that printed this game, and the original French company both seem to have gone defunct.

Luckily we have part of the French rules, and a semi-established terminology for "Zapped";
Zapping is the act of moving by exact roll onto a space occupied by an opposing piece, and thereby removing them from the game-board, and placing them into their original starting position.

What's still unclear though, is if you are able to "Zap" a piece using the optional move distance allowed when rolling a 6 (or Chameleon).