Possible Clues:

• Syllable from the Giant
• Fi fo follower
• Phoenix is fine? Express doubt
• 'Fee fie foe --!'
• ''Fi fo'' follower
• 'Fee fi fo ___'
• Legendary Chinese bird that is sometimes called the phoenix
• 'Fee, fi, fo, —!'
• 'Fee, fi, fo, '
• 'Fee fi fo --!'