Missed tea being served up in cup (9)
I believe the answer is:
demitasse
'cup' is the definition.
(demitasse is a kind of cup)
'missed tea being served up' is the wordplay.
'being served up' is an anagram indicator.
'missed'+'tea'='missedtea'
'missedtea' with letters rearranged gives 'DEMITASSE'.
'in' acts as a link.
(Other definitions for demitasse that I've seen before include "Small cup for black coffee" , "Coffee-cup" , "little cup" .)