Tom Brown's school sport (5)
I believe the answer is:
rugby
I believe this is a double definition.
'tom brown's school' is the first definition.
(I've seen this before)
'sport' is the second definition.
(I know that rugby is a type of football game)
(Other definitions for rugby that I've seen before include "Midlands town" , "Town in Warwickshire" , "Type of football; school" , "Fifteen-a-side sport -- Olympic event in 1900, 1908, 1920 and 1924" , "Tom Brown's school" .)