Soldier heartlessly sent back makes news (6)
I believe the answer is:
report
'news' is the definition.
(report is a kind of news)
'soldier heartlessly sent back' is the wordplay.
'soldier' becomes 'trooper' (trooper is a kind of soldier).
'heartlessly' means to remove the middle letters.
'sent back' says the letters should be written backwards.
'trooper' with its centre removed is 'troper'.
'troper' written backwards gives 'REPORT'.
'makes' is the link.
(Other definitions for report that I've seen before include "Formal statement" , "Explosion" , "Noise - information" , "Inform on - official statement" , "Sudden noise; account of progress" .)