Related Clues:

• Weak and small
• Needing iron in one's diet, perhaps
• Lacking iron
• Needing iron
• Small play on words ending in hilarity
• Far from energetic
• Easily exhausted
• Feeble wordplay at end of story
• Hemoglobin-deficient
• Frail and weedy
• Lacking vim
• Iron-deficient, maybe
• Far from vigorous
• In need of iron pills
• Not at all vigorous