Temper resulting from upset tea urn (6)
I believe the answer is:
nature
'temper' is the definition.
(thesaurus)
'upset tea urn' is the wordplay.
'upset' indicates anagramming the letters.
'tea'+'urn'='teaurn'
'teaurn' with letters rearranged gives 'NATURE'.
'resulting from' is the link.
(Other definitions for nature that I've seen before include "Picturesque countryside" , "Disposition, temperament" , "Essential qualities or characteristics" , "The world with all its features found in tea-urn" , "Innate quality" .)