Possible Clues:

• Sirens! But sailors were advised to disregard them
• Cue a line on good among evil
• Noteworthy
• Outstanding film director is making comeback
• Indicate bearing in prisoner is regressing
• The message is that one gains fifty from this
• A wink or a nod, e.g.
• (Railway) indicator
• Noteworthy instruction to act
• Pair of lamps, maybe