Possible Clues:

• Refuse to deal with man reported for crime
• Supreme letters (1937-71)
• Lack a limb to execute this crime
• Extortion by threat of exposure
• Threats through the post for 34 across
• Money demanded under threat of revealing unpleasant facts
• Crime of demanding money by threat of exposure
• Security housing need - large amount made by 13 down 26 down
• Angry letters following crime
• Thunderous-looking Irishman upset at the threat of a soaking