Possible Clues:

• See 12 Across
• What a loser brings up?
• What you can bring up, in a phrase
• Bring it up at the back
• At that point the artist turns up here at the back
• Back to what's not four, by the sound of it (3, 4)
• Back at that point the Academician turns back
• Not for this part, by the sound of it