Possible Clues:

• Without a minute to spare
• Imprisoned owing to sentence made at the critical moment
• Behind bars, old fellow closing call at a critical point? (2,3,4,2,4)
• Imprisoned frequently, I am last to escape with moments to spare (2,3,4,2,4)
• Jailed in relation to prison sentence, almost too late (2,3,4,2,4)
• Without a second to spare
• When to be saved from the theme entries?
• Imprisoned old fellow given sentence before it's too late
• Imprisoned old fellow must get over sentence just at a critical moment (2,3,4,2,4)
• Imprisoned frequently, I am free finally -- just before something terrible happens? (2,3,4,2,4)