Scrap yard (4)
I believe the answer is:
spar
I believe this clue is a double definition.
'scrap' is the first definition.
(thesaurus)
'yard' is the second definition.
(I've seen this before)
(Other definitions for spar that I've seen before include "dispute" , "Train at boxing; mineral" , "Wooden pole -- box" , "Box; various minerals" , "Pole-shaped part of the rigging" .)