### Clue: Jay, in books, appearing colourful around bank (6)
### Answer: GATSBY 
 ### Explanation: Definition: Jay, in books
 GAY(appearing cheerfully colourful) **containing**(around) TSB(the British retail bank).
Answer: The character, Jay Gatsby in F. Scott Fitzgerald's "The Great Gatsby". The "in books" held my up – I'm not sure if that same character is to be found in other, besides that one, book.