Possible Clues:

• If you had a meal shortly before midnight, that might make you thin
• To have eaten so late is enough to makle you thin
• Reduced number, you said, visiting a gallery?
• Will this reduce the effect of thickness after nine getting you to eat earlier?
• They say solver had dinner late to lose strength
• Become thin -- from what we hear, you dined late
• Slim type at foreign museum covering a foreign review
• Reduced time for news update after not getting paid
• Slim down, getting neat and taut, exercising with energy
• Slender cardinal you texted in a gallery