Possible Clues:

• Throw out rising pong — with doctor it could go off
• Exploding ticker?
• Having met bimbo for refreshment, one should go off to order
• Preprogrammed explosive
• Device set to explode later
• ''Goldfinger'' device
• The setter usually goes off before this
• Should it go off, I'm to be turning in my grave?
• US magazine to fail? It's a disaster waiting to happen
• It's set to explode