Possible Clues:

• Attractive folk who are destructive?
• Atom — (nuclear devices)
• The girl's in second service, dazzling people
• Saints protect relative from his companion's very good looking local women
• Old dandy infiltrating the holy guys who appear to be very attractive?
• People having big hits that look lovely?
• Breakers of things - or, informally, very good-looking women
• Particle accelerators, atomwise
• Informally, good-looking women - sound destructive
• See 39-Across