Fresh heart for tearaways (3)
I believe the answer is:
raw
'fresh' is the definition.
(I've seen this in another clue)
'heart for tearaways' is the wordplay.
'heart' indicates a hidden word (I've seen 'heart of' mean this).
'RAW' can be found hidden inside 'for tearaways'.
(Other definitions for raw that I've seen before include "Red and inflamed" , "Natural" , "Unrefined" , "Abraded" , "Uncooked; immature" .)