Possible Clues:

• Oaks, for one and girl for one in it (7)
• Eg, screw thread
• At last, a girl, I see, for 1 across
• Oaks for one girl I see at last
• Book for the big race
• Girl I see accompanying Conservative model
• Top-quality work produced by pupils in college, initially
• Judged over a long period to be of high quality
• Book unlikely to go out of print
• "The Godfather" is thought to be one