Grime fighter (7)
I believe the answer is:
cleaner
'grime fighter' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cleaner that I've seen before include "One who dusts or vacuums" , "Charwoman - vacuum" , "More hygienic" , "Char, daily" , "Char; detergent" .)