Surgeons specializing in reconstructive and cosmetic vulvar and vaginal surgery would be able to address clitoral phimosis. I have performed this procedure in patients suffering from chronic Lichen Sclerosus with severe labial agglutination who have developed clitoral phimosis with excellent results.
See link below for examples from my photo gallery.
Best of luck,
Oscar A. Aguirre, MD
Aguirre Specialty Care - Pelvic Surgery & Intimate Aesthetics®