Related Clues:

• Concentrated, though deficient in understanding
• The country's crowded
• Stupid Henry's nipped by parasite
• Not clear to the stupid
• Broad; dense
• Friendly but stupid?
• Dense Henry got right mark going round
• Concentrated hard within short time
• Pushing hard into second, struggling to get to Cambridge?
• The Yorkshire bumpkin is stupid
• Stupid; (of fog) dense
• With 66-Across, slow learner in the litter?
• Broad moment round hospital
• Decidedly obtuse
• Sign of approval about hospital being very friendly