Possible Clues:

• Person of exceptional intelligence was hard to indoctrinate
• Egghead was hard to indoctrinate
• Condition of supporters, with Hearts pinching a win, surprisingly?
• Indoctrinate supporter swimming off Hunstanton?
• Supporter at home was hard to indoctrinate
• Supporter, at home, was hard to indoctrinate
• Exceptionally intelligent person was hard to indoctrinate
• Stop thinking underwear is being laundered?
• Subject someone to stressful indoctrination
• To convert drunk in bar used to be hard