Stops putting fresh heart into the arts (7)
I believe the answer is:
arrests
'stops' is the definition.
(arrest is a kind of stop)
'fresh heart into the arts' is the wordplay.
'heart' indicates the central letters.
'into' indicates putting letters inside.
The centre of 'fresh' is 'res'.
'res' going into 'arts' is 'ARRESTS'.
'putting' is the link.
(Other definitions for arrests that I've seen before include "has a heart attack" , "made by police" , "collars" , "Apprehends" , "Checks" .)