Possible Clues:

• It's pushed in a crisis
• Way to get help (at a push)?
• It's pressed in distress
• One hit by the terrified
• At first, pressing on it can stir, but should be restricted
• What may be used by pushers in a fix?
• Emergency response initiator
• Frantic pusher's target?
• Item pressed in a bad situation
• Thing pushed during a crisis, so to speak