Possible Clues:

• If not, except
• A second off being clouded over: adverse condition to follow
• Except for minus one in France
• Except under the circumstances that it's minus one in France
• Except on condition that there's one fewer in France
• Save if
• Minus one in France (6)
• In conjunction, dare one say 'more'?
• Not if
• Save under the circumstances where it's minus one in France