Related Clues:

• They're shown to novices
• Guys possibly helping to make Europe secure
• They're shown to trainees
• What experts know — their onions?
• Uses a pacifier
• What rookies are shown, with "the"
• Painters known by clued-up workers?
• Onion or pearl strings
• Experts are familiar with these lines
• Lines learnt by old hands
• Good people know these weaker people may be on them?
• Stays perhaps to make unwelcome advances - not good
• Draws into the mouth
• Guys fondle topless stripper at the front
• Stout cords