Next day the bee is buzzing about (6)
I believe the answer is:
beside
'next' is the definition.
Both the answer and definition are adverbs.
Maybe there's an association between them I don't understand?
'day the bee is buzzing about' is the wordplay.
'day' becomes 'd' (abbreviation for day).
'buzzing' indicates an anagram (letters buzz around).
'about' is an insertion indicator.
'bee'+'is'='beeis'
'beeis' anagrammed gives 'besie'.
'd' going inside 'besie' is 'BESIDE'.
Can you help me to learn more?
(Other definitions for beside that I've seen before include "Next to - compared with" , "- - the point" , "Neighbours" , "Adjacent to" , "Next door to" .)