Quarter (6)
'quarter' is the definition.
(a quarter is a fourth of something)
This is the entire clue.
(Other definitions for fourth that I've seen before include "Almost winning medal?" , "C-F musical interval -- Prince Regent George's eventual regnal number" , "The Press is referred to as this estate" , "Ordinal number for the press - the . . . . . . estate" , "(and 4) The press" .)
'quarter' is the definition.
(I have seen 'A quarter' mean 'district' so perhaps 'quarter' could also mean 'district')
This is all the clue.
(Other definitions for district that I've seen before include "Locality" , "Area of town or country" , "Area (of a town/city)" , "Area of a town or city" , "Region marked off for administrative or other purposes" .)