Possible Clues:

• Musical instruction usually following a pizzicato section
• Gas brand hidden in "solar collector"
• Former BP gas chain
• ___ Arena (former home of the Sacramento Kings)
• Direction to bow, for a violinist
• ___ iris (Spanish for 'rainbow')
• Discharge, old and bowed
• Gas brand offering Top Tier gasoline
• Taking a bow at the symphony?
• Gas brand hidden in "car company"