Related Clues:

• When about 50, one is not switched on
• Line grabbed by one in the dark
• Unacceptable (colloq.)
• One left inside in the dark
• Not on
• It's unacceptable, whichever way you look at it
• Weightless? Impossible
• Either way, it's unlikely
• In the dark? Not if one's succeeded before
• Group of soldiers protecting line in the dark
• A right given to a man put off
• Military team circles lake in the dark
• Less than a century unacceptable
• Not yet fired up, one drinks litre
• Trapped by one, left in the dark