Possible Clues:

• Amphibian's extremities in particular difficult to keep cool?
• Afraid wages cut will go through
• Pick up the tab? (... letters 3-6)
• Screw secures prison in terror
• Screw going round prison in fear
• Fastidious about article that's not cool
• Adjective for 18 Across
• Frightened old man cut off, beginning to yell
• Police station in settlement makes you anxious
• Cooking vessel disgusting, so in a tizzy