Makes good with crushed shale (5)
I believe the answer is:
heals
'makes good' is the definition.
Although both the answer and definition are verbs in their -s form, I don't understand how one could define the other.
'crushed shale' is the wordplay.
'crushed' is an anagram indicator.
'shale' anagrammed gives 'HEALS'.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for heals that I've seen before include "Mends, recovers" , "Makes well" , "Returns to health" , "Cures" .)