Cured, sick journalist shrank (7)
I believe the answer is:
reduced
'shrank' is the definition.
('reduce' can be a synonym of 'shrink')
'cured sick journalist' is the wordplay.
'sick' is an anagram indicator.
'journalist' becomes 'ed' (short for editor).
'cured' with letters rearranged gives 'reduc'.
'reduc'+'ed'='REDUCED'
(Other definitions for reduced that I've seen before include "Made less in size etc" , "Got rid of some bodily weight" , "looked smaller" , "Boiled down" , "Curtailed" .)