Old silver presented to journalist (4)
I believe the answer is:
aged
'old' is the definition.
('aged' can be similar in meaning to 'old')
'silver presented to journalist' is the wordplay.
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'presented to' means one lot of letters go next to another.
'journalist' becomes 'ed' (short for editor).
'ag'+'ed'='AGED'
(Other definitions for aged that I've seen before include "not like a callow youth" , "Antiquated" , "Senescent" , "Grew older" , "Got older" .)