Possible Clues:

• Deputy in the grip of depravity
• Certain squad's target
• Bad habit — it grips
• What's wrong with upper part of church? God's not died, he's in higher education
• It's no good to be so cold after five
• Part of 36 Across' title
• Gambling or drinking
• Annual resolution target
• Reserve following very bad habit
• Prefix for deputy to, say, chairman