Possible Clues:

• CO allegedly held back with hesitation
• Who, for example, inverted degenerate set of principles endlessly?
• Ph.D. holder's title
• Mix with sister's colleague
• Serves up starters resting on tuna fish for sister's colleague
• Alter (with an intention to deceive)
• Medical specialist
• Medical practitioner or holder of a PhD
• Change be enough? Bankers to count on the other hand
• One should make you better fudge