Cooked on beach without trendy dinnerware (4,5)
I believe the answer is:
bone china
'dinnerware' is the definition.
(bone china is a type of dinnerware)
'cooked on beach without trendy' is the wordplay.
'cooked' indicates anagramming the letters (letters cooked into a new form).
'without' means one lot of letters goes inside another ('without' can be similar in meaning to 'outside').
'trendy' becomes 'in' ('in' can mean fashionable).
'on'+'beach'='onbeach'
'onbeach' is an anagram of 'bonecha'.
'bonecha' enclosing 'in' is 'BONE CHINA'.
(Other definitions for bone china that I've seen before include "What may make service" , "Material from Potter" , "eating off this?" , "Delicate base for service" , "Coalport" .)