Consented to produce article on avarice (6)
I believe the answer is:
agreed
'consented' is the definition.
(agreeing is a kind of consenting)
'article on avarice' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'avarice' becomes 'greed' (synonyms).
'a'+'greed'='AGREED'
'to produce' acts as a link.
(Other definitions for agreed that I've seen before include "Assented, acquiesced" , "Geared (anag.)" , "Saw eye to eye" , "Said yes" , "Did concur" .)