Two kinds of brush (5)
I believe the answer is:
scrub
'brush' is the definition.
(scrub brush is a kind of brush)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for scrub that I've seen before include "insignificant type" , "Take out - clean" , "Area of dense stunted vegetation" , "Discontinue" , "remove cosmetic" .)