Possible Clues:

• Oscar has to be in credit for a month
• Eighth month in Roman calendar
• Oscar to be in credit for month
• World Series month, usually
• When is area of Languedoc to be revisited?
• Nothing odd about order book tycoon presented over part of year
• What the Old English called 'Winterfylleth'
• Birth month for many a Libra
• Ordinary to be in credit for a month
• Month for World Vegetarian Day