Possible Clues:

• Stomach device briefly placed under jaw
• Stomach-related wind illusory, so they say
• Relating to or involving the stomach
• A bit of beluga -- strictly for the stomach!
• Air-con said to produce a type of 'flu
• Type of bypass surgery
• A bit of yoga, strictly about the stomach
• Recipe to stop jaw spasm affecting part of 22
• Flop keeps backs most of the trick - it's a gut reaction
• Hangover chiefly to restrain incipient corpulence of the stomach