Possible Clues:

• Persevere at all costs
• "You can't give up" ... or a command you'll obey while reading the answers to the starred clues aloud
• Seven are DIY fans, and don't give up hope
• Serenade Ivy, hopelessly? Don't give up, no matter what
• Soldier on exercise eyes invader
• Ozzy-fronted '78 Sabbath album
• 1954 Epsom Derby winner
• Persevere, like a stand-up comic?
• "Keep going!"
• Don�t give up -- and don�t tell someone else to give up?