Possible Clues:

• Exception lead-in
• Weasel word
• 'Hold on, I just might have a good solution ...'
• if not more?
• Tower of Power "I Won't Leave ___ You Want Me To"
• If not in France one lower
• The Tubes "My Head Is My Only House ___ It Rains"
• ". . . __ otherwise noted"
• 'But wait, what if ...'
• 'Well, it actually might work if ...'