Possible Clues:

• Below par
• Falling short of some prescribed norm
• Inferior editorial team member on London paper, briefly
• Inferior replacements and doctor dart about
• Up-and-coming American poet maintains position that's unworthy
• Ensign with warship is not up to scratch
• Meat, lettuce, cheese and tomato in a foot-long bun?
• Defective vehicle overturned on model
• Inferior underwater vehicle ideal
• Not good enough!