Drink ordered for a teach-in (5,3)
I believe the answer is:
china tea
'drink' is the definition.
(I've seen this before)
'ordered for a teach-in' is the wordplay.
'ordered for' indicates anagramming the letters.
'a'+'teach'+'in'='ateachin'
'ateachin' is an anagram of 'CHINA TEA'.
(Other definitions for china tea that I've seen before include "Leaves for drink" , "cuppa?" , "Eastern drink" .)