Labour prime minister (5)
(Other definitions for brown that I've seen before include "Mixture of red, yellow and blue" , "Tan" , "Dark - tanned - successor to Blair?" , "It is used for wrapping" , "Fry in a pan until it changes colour" .)
(Other definitions for blair that I've seen before include "Was this prime minister a Libra?" , "Tony . . . . ., British ex-PM" , "See 3" , "He followed Smith as party leader" , "Tony ..... Labour leader in Britain" .)