Possible Clues:

• Subtly varied
• Subtle and revolutionary study about unionist attracting African politicians
• Refined African politicians in revolutionary study of a subtle sort?
• Subtle twist in Duncan Edwards' initiation
• Given subtle variation
• Subtly changed
• Greek character performing dance that's slightly different
• Half naked, did a jig, not initially subtle
• Far from clear-cut
• Delicate character in taverna, say, managed dance