Selected work journalist pens in Time (5)
I believe the answer is:
opted
'selected' is the definition.
'work journalist pens in time' is the wordplay.
'work' becomes 'op' (abbreviation for opus**).
'journalist' becomes 'ed' (short for editor).
'pens in' means one lot of letters goes inside another.
'time' becomes 't'.
'op'+'ed'='oped'
'oped' enclosing 't' is 'OPTED'.
(Other definitions for opted that I've seen before include "Selected from depot" , "Chose from depot" , "Depot (anag.)" , "Plumped (for)" , "Made choice, selected" .)