Related Clues:

• Dishonest
• Suspect
• Not kosher
• Fishy
• Of dubious character
• Unsavory
• Like an elm-lined street
• Like a tree-lined path
• Blocked from sunlight
• Not quite on the up-and-up
• Dubious
• Of ill repute
• Like a tree-lined street
• Of questionable character
• Not on the up and up