Whenever a player spends at least one click to initiate an effect, s/he is considered to be taking an action. An action can only be triggered during a player's Action Phase. Once an action is stated, it must be fully resolved before another action can be initiated.
|Page 30, Column 1, Paragraph(s) 2, Core Rule Book|
|Action: What a player performs on his turn whenever he spends one or more clicks.|