Crowe of "Gladiator" (7)
I believe the answer is:
'crowe of gladiator' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for russell that I've seen before include "Philosopher - prime minister - film director" , "He did philosophy" , "See 2" , "Bertrand ___ , philosopher and mathematician, d. 1970" , "Jack -, type of terrier" .)