Cardinal grabbing small journalist (7)
I believe the answer is:
newsman
'journalist' is the definition.
(I've seen this before)
'cardinal grabbing small' is the wordplay.
'cardinal' becomes 'newman' (19th-century Cardinal John Henry Newman).
'grabbing' is an insertion indicator.
'small' becomes 's' (abbreviation - e.g. clothes size).
'newman' placed around 's' is 'NEWSMAN'.
(Other definitions for newsman that I've seen before include "Reporter" , "Press person" , "who sells rags" , "Journalist" , "he reports" .)