Related Clues:

• Said to be only five of them if you count the people, by the sound of it
• Intellectual power
• Why, is that the matter over a boy?
• This is why one will get to know about one of your family
• Why, that's about a bit of the end of 21 across
• Is this why it's about your boy?
• That's why it seems to be about your boy
• That's why it's one of 1 across (6)
• One has five that sound like ends of 10 across
• Is that why there's something the matter with a boy of yours?
• That's why it's about a start for 9 across
• 'Faculties count for the population, by the sound of it (6)'
• One has a feeling that traditionally there are five
• All five sound as if they count for people
• That's why this should be about one's boy