Possible Clues:

• The footless ones are about to be angry to a pronounced extent
• A head of state confronts hijackers with such letters
• Pronouncedly like criminals at sea
• Breathes in dodgy parasites
• Hopes to include a time for such letters
• Like robbers, gives stress to hotel
• Draws by suction
• They're pronouncedly like sea crooks
• Sounds the h's like the 'yo, ho, ho' robbers?
• Breathes harder when irrational speeds called for