Possible Clues:

• Engrossed artist emptied paint
• Spellbound artist exercises
• Reason for a health inspector's alarm
• Quite focused, as attention
• First of readers liable to be absorbed
• Spellbound? That’s right and appropriate
• Agog
• Fascinated, talked out loud
• Absorbed — and made into a parcel, it's said
• Riveted to the tube, say