Possible Clues:

• Composer names his drink with hesitation - might be mere rye
• Describes one who always says what s/he thinks
• Frank could be anything in Yorkshire
• Frank striving to jog from pole to pole
• Inclined to say exactly what one thinks
• Excuse said to be forthright
• Going down it's across, perhaps, as 10 across will turn at last
• Hardly reserved
• Candid review of UK, spot on about English
• Exposes writer concealing passable bluff