Newsworthy subject — Capone? (7)
I believe the answer is:
topical
'newsworthy' is the definition.
(I've seen this before)
'subject capone?' is the wordplay.
'subject' becomes 'topic' (as in a topic for discussion).
'capone?' becomes 'Al' (gangster Al Capone).
'topic'+'al'='TOPICAL'
(Other definitions for topical that I've seen before include "Current - local - up-to-date" , "Up to date" , "Some skin lotions are" , "Dealing with current affairs" , "currently under discussion" .)