Related Clues:

• A base for mouse on a climbing plant? I'm no expert!
• A tangle over Europe lacking professionalism
• Ham tea served in a very old city
• One's not pro-America and against Europe, no gains in that
• Hornung's cracksman presumably unrewarded
• Unskilled ship's officer visiting a Babylonian city
• A colleague said you are incompetent
• A win at chess and half your professional rules won't concern me
• Lover and partner wearing gold rings upfront
• Bobby Jones, for his entire golfing career
• Hobbyist, perhaps
• A partner going to old city is not professional
• Unpaid (sports)
• Gold rush initially absorbing partner without finesse ...
• A mature though unreliable layman