Possible Clues:

• Tory leader has pain in bum
• Dog, or feature thereof
• Shadow cabinet finally suffer
• Follower, as in espionage
• Something for a dog to wag
• Private investigator taking time and trouble
• I’m thankful I left the last part!
• Suspect's concern
• Follow closely — taper (off)
• Apt attachment to the ends of 30-, 37-, 59- and 62-Across