Old man carrying article made of wood (5)
I believe the answer is:
oaken
'made of wood' is the definition.
(made of oak)
'old man carrying article' is the wordplay.
'old' becomes 'o' (abbreviation as in OT - Old Testament).
'man' becomes 'ken' (short for Kenneth).
'carrying' says to put letters next to each other (in a down clue, the bottom letters carry others).
'article' becomes 'a' (the indefinite article in English).
'ken' after 'a' is 'aken'.
'o'+'aken'='OAKEN'
(Other definitions for oaken that I've seen before include "Timber" , "(Old adjective for something) made of a deciduous tree's wood" , "like some old cabinets" , "of one wood" , "Of the acorn tree" .)