Possible Clues:

• People with 'A' start to learn Greek, say
• Failing - on a Latin subject
• Of a particular country
• Convert Alan into a citizen
• Grand - - (Aintree)
• Grand event
• Like some monuments
• Cross-country race?
• One on in there in South Africa may be grand for horses
• It's grand where it's at a tree that's after being A1