Possible Clues:

• The right word at the right time?
• A perfect term of French
• Flash opening of trade fair by European displaying suitable expression
• Testament very recently penned by setter, appropriate thing to say
• What writer seeks, only in small quantity
• Appropriate word
• Perfect word choice
• Perfect expression
• Word that fits in Times Jumbo's sadly not British English
• Number right away around a set of books before judge -- such fits context perfectly