Possible Clues:

• L.A.'s region
• L.A.'s area
• Golden St. region
• L.A.'s region, casually
• Home of S.D. and the O.C
• L.A.'s area, for short
• Region bordering Mex
• Orange County's area, slangily
• San Diego's locale, for short
• Region with Legoland, informally [S]