Article supports Los Angeles machine (5)
I believe the answer is:
lathe
'machine' is the definition.
(I've seen this before)
'article supports los angeles' is the wordplay.
'article' becomes 'the' (the 'definite article' part of speech).
'supports' means one lot of letters go next to another (bottom letters provide a support for the top ones).
'los angeles' becomes 'la'.
'the' put after 'la' is 'LATHE'.
(Other definitions for lathe that I've seen before include "Revolver" , "craftsman's machine" , "Machine for turning and shaping wood etc" , "Wood-shaping machine" , "Rotating machine tool" .)