Revive Roman who shattered neck (7)
I believe the answer is:
quicken
'revive' is the definition.
(I know that revive can be written as quicken)
'roman who shattered neck' is the wordplay.
'roman who' becomes 'qui' ('qui' is 'who' in Latin).
'shattered' is an anagram indicator.
'neck' with letters rearranged gives 'cken'.
'qui'+'cken'='QUICKEN'
(Other definitions for quicken that I've seen before include "Move faster" , "Give life to" , "Accelerate; become alive" , "Make faster; stimulate" , "Race; pick up speed" .)