Related Clues:

• Press it, rudely?
• Doggedly continue training scientists first
• Dancing sprites linger in the mind
• Last out of newspapers is Times
• Stick with a brood including son
• Extract from newspapers is Times' last
• Keep trying to remove stripes
• Name-dropping spinster resolved to keep going
• Keep at
• Refuse to stop
• What a bad cold may do
• Never quit
• Not let up
• Is salesman turning up on street last?
• One word for dragon, in two words!