Beauty with a heart of stone (5)
I believe the answer is:
peach
'beauty' is the definition.
(I know that beauty can be written as peach)
'with a heart of stone' is the wordplay.
'with' says to put letters next to each other.
'a' becomes 'alpha' (the Greek letter A).
'heart of' means to look at the middle letters.
'stone' becomes 'each' (I can't explain this - if you can you should believe this answer much more).
The central letter of 'alpha' is 'p'.
'p' put next to 'each' is 'PEACH'.
Can you help me to learn more?
(Other definitions for peach that I've seen before include "Pinkish-orange colour" , "Inform on" , "Fruit with downy skin" , "One of the items in the fruit bowl" , "Shade of pink tinged with yellow" .)