Possible Clues:

• Gents cooked outside food and I start eating with gusto
• Enters carrying food, so don't hold back!
• Brings takeaway home, having to work hard
• Acquire schoolboy grub seized by error -- eat up!
• Goes out for take-away? Concentrate on your work!
• Start with determination but can't finish?
• Begin (something) with determination
• Start eating (colloq.)
• Brings food home to eat with relish