Possible Clues:

• Part (anag.)
• Enveloped in sound, spellbound
• Like the parcel, say, one's so interested in
• Transported by river? That's likely
• Very interested in the apartment at the far end
• Gripped right and proper
• Enthralled by artillery exercises
• Artist with small part in Spellbound
• It's right and proper to be so absorbed
• Deeply involved