Assemble silver a man consumed (9)
I believe the answer is:
aggregate
'assemble' is the definition.
(thesaurus)
'silver a man consumed' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'a man' becomes 'greg' ().
'consumed' becomes 'ate' (to eat is to consume food).
'ag'+'greg'+'ate'='AGGREGATE'
(Other definitions for aggregate that I've seen before include "small stones" , "Material mixed with cement to form concrete" , "The whole amount" , "Sum of many heterogenous things taken together" , "Combine into a whole" .)