Related Clues:

• A spy may go by one
• Sot, to W.C. Fields
• Secret identity
• Also, in name only
• Spy's "name"
• Doe, perhaps
• What a celebrity might use at a hotel
• Sundance Kid, for one
• Regrettably jailing one giving false name
• Robert Galbraith, to J. K. Rowling
• Secondary handle
• 'aka' name
• 'A Lady' for Jane Austen, e.g
• Pseudonym of sorts
• What a pity, I included assumed name