Fight to get rid of something (5)
I believe the answer is:
scrap
'fight' is the definition.
(a scrap is a minor fight)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for scrap that I've seen before include "Ditch - fight" , "Small piece; abolish" , "boxing match?" , "Dispose of" , "Oddment" .)