Popular journal one catholic finds 'lifeless' (9)
I believe the answer is:
Here is my best explanation:
'lifeless' is the definition.
'popular journal one catholic' is the subsidiary indication.
'popular' becomes 'in'.
'journal' becomes 'organ' (I've seen this before).
'one' becomes 'i' (Roman numeral).
'catholic' becomes 'c' (abbreviation as in RC for Roman Catholic).
'finds' is the link.
(Other definitions for inorganic that I've seen before include "Non-carbon (chemistry)", "Not of animal/vegetable origin", "artificial", "Not derived from living matter", "without carbon", "Man-made" and "What can describe something alien to life".)