Busy nodding about council (5)
I believe the answer is:
synod
'council' is the definition.
(I know that synod is a type of council)
'busy nodding about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'SYNOD' is hidden within 'busy nodding'.
(Other definitions for synod that I've seen before include "Clerical assembly" , "group of clergymen" , "Forum for discussing" , "Ecclesiastical gathering" , "Assembly of the clergy" .)