Fracas in ditch (5)
I believe the answer is:
scrap
I believe this is a double definition.
'fracas' is the first definition.
(I've seen this in another clue)
'ditch' is the second definition.
(I've seen this in another clue)
'in' is the link.
(Other definitions for scrap that I've seen before include "Oddment" , "A little bit of a fight" , "Fragment or morsel" , "Discarded metal or slang fight" , "Leftover; fight" .)