A brief furore about unexciting idea from above? (8)
I believe the answer is:
afflatus
'idea from above?' is the definition.
(term for divine inspiration)
'a brief furore about unexciting' is the wordplay.
'brief' means to remove the last letter.
'furore' becomes 'fuss' (I've seen this before).
'about' indicates putting letters inside.
'unexciting' becomes 'flat' (I've seen this before).
'fuss' with its final letter taken off is 'fus'.
'fus' enclosing 'flat' is 'fflatus'.
'a'+'fflatus'='AFFLATUS'
(Other definitions for afflatus that I've seen before include "inspiration" , "Poet's creative impulse" .)