Related Clues:

• The Stooges, e.g.
• Triad
• Triumvirate you need time to look up in a book
• Putting prophet up in model dwelling results in triangular relationship
• Not a properly constituted company?
• Trio
• Arrangement in 'Shame'
• More than a couple
• Chekhov's sisters, for example, see mother being abused
• See mother running round triplets
• Magi making a crowd, they say? Not many
• Temperature in houses upset forecaster crowd, perhaps
• Horse meet assembled for triangular event
• One more than a couple
• The Fates, perhaps, met heroes grimly