Related Clues:

• Dubious
• Of ill repute
• Like a tree-lined street
• Of questionable character
• Not on the up and up
• Like a red-light district
• Morally ignoble
• Less than legit
• Less than reputable
• Seamy
• Sordidly unpleasant
• On the sordid side
• Protected from the sun
• Of questionable repute
• Sun-shielded