Hair on mineral causes stir (6)
I believe the answer is:
furore
'stir' is the definition.
(thesaurus)
'hair on mineral' is the wordplay.
'hair' becomes 'fur' (fur is a kind of hair).
'on' means one lot of letters go next to another.
'mineral' becomes 'ore' (ore is a kind of mineral).
'fur'+'ore'='FURORE'
'causes' is the link.
(Other definitions for furore that I've seen before include "Wild excitement; craze" , "Very angry reaction" , "Uproar, fuss and fury" , "Noisy state of wild confusion" , "To-do" .)