Strikes out with fresh heart, one gathers (5)
I believe the answer is:
reaps
'one gathers' is the definition.
(I've seen this in another clue)
'strikes out with fresh heart' is the wordplay.
'strikes' becomes 'raps' (rapping is a kind of striking).
'out' indicates putting letters inside.
'with fresh heart' becomes 'e' (I am not sure about this - if you are sure you should believe this answer much more).
'raps' going around 'e' is 'REAPS'.
Can you help me to learn more?
(Other definitions for reaps that I've seen before include "Gleans or harvests" , "Harvests with strange spear" , "Harvests (a crop)" , "Cuts, gathers grain" , "crops" .)