Related Clues:

• Make like a geyser
• Let it out
• Sigh, for example
• Disgorge, as lava
• Etna does it
• Breathe out
• Yoga command
• Emit breath
• Let out a breath
• What a volcano can do
• Eject violently
• Emulate a geyser
• Say "Whew!," say
• Show relief, in a way
• Gush, as a volcano