Rushed round with a warm heart and showed clemency (6)
I believe the answer is:
spared
'showed clemency' is the definition.
(I've seen this in another clue)
'rushed round with a warm heart' is the wordplay.
'rushed round' becomes 'sped' (I am not sure about this - if you are sure you should believe this answer much more).
'with' indicates putting letters inside.
'heart' means to look at the middle letters.
The middle letters of 'warm' are 'ar'.
'sped' placed around 'ar' is 'SPARED'.
'and' is the link.
Can you help me to learn more?
(Other definitions for spared that I've seen before include "Unharmed" , "Refrained from hurting, was merciful towards" , "Treated mercifully" , "Voluntarily parted with" , "Was merciful toward, refrained from harming" .)