Kind of brewed tea urn (6)
I believe the answer is:
nature
'kind' is the definition.
(I've seen this before)
'brewed tea urn' is the wordplay.
'brewed' indicates anagramming the letters.
'tea'+'urn'='teaurn'
'teaurn' anagrammed gives 'NATURE'.
'of' is the link.
(Other definitions for nature that I've seen before include "sort of reserve" , "Disposition, temperament" , "The physical world" , "Motherly" , "All non-artificial phenomena" .)