Possible Clues:

• Undergo alteration
• Change into something else
• Turns one's stomach what one ate for a change
• Transform comrade embracing posh Tory leader
• Transform mum without thanks
• With stomach upset, took refreshment to effect a change
• Change makes corporation upset and worried
• It will make a change to turn your stomach if you swallowed this
• Change in genetic way, perhaps from radiation
• Get out of shape?