Tea put round in mostly warm English porcelain (9)
I believe the answer is:
chinaware
'porcelain' is the definition.
(I've seen this before)
'tea put round in mostly warm english' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'put round' means one lot of letters goes inside another.
'mostly' means to remove the last letter.
'english' becomes 'E' (abbreviation).
'cha' going around 'in' is 'china'.
'warm' with its final letter removed is 'war'.
'china'+'war'+'e'='CHINAWARE'
(Other definitions for chinaware that I've seen before include "Ceramic articles" , "service, perhaps" , "Fragile articles" , "porcelain" , "Dresden set" .)