Related Clues:

• Avid about
• Hooked on
• Passionate about
• Nuts about
• Deeply involved with
• Look ___ (study)
• Word with ''each life'' or ''thin air''
• A big fan of
• Word with ''each life''
• See 69-Across
• Very much a fan of
• Wild about
• See 29-Across
• Division preposition
• Making a hobby of