Possible Clues:

• Sparkle, gleam
• Shine like the seafood in Yorkshire?
• Word repeated before 'little star,' in a nursery rhyme
• Flash starter in tasty seafood
• Shimmer
• & 6 Down & 10 Across Krays perhaps surrounding rickety Elk Lake billet (misprinted, Times admitted) -- nonsense from 6 Across 18 Down
• When repeated, what little stars do
• 1 12 character ignores Iggy — stars do it
• Act like a star
• See 39-Across