Possible Clues:

• Harsh cut with end of knife
• Austere, spartan
• Strictly speaking, it is always inside
• Cute? Strictly speaking, perhaps
• Cut by a quarter? That's serious
• Strictly speaking it's always inside
• Hard to endure
• See about the strict cleric up there
• 'It's always on the inside, strictly speaking (6)'
• Unnecessarily extreme