Mineral’s origin: can that’s been cracked open (9)
I believe the answer is:
inorganic
'mineral's' is the definition.
(similar in meaning)
'origin can that's been cracked open' is the wordplay.
'origin can' anagrams to 'INORGANIC'.
Though, I am unsure how this is indicated.
Can you help me to learn more?
(Other definitions for inorganic that I've seen before include "artificial" , "What can describe something alien to life" , "Not deriving from living matter" , "Non-carbon (chemistry)" , "Not of animal/vegetable origin" .)