Exciting business, with our full assembly (9)
I believe the answer is:
colourful
'exciting' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'business with our full assembly' is the wordplay.
'business' becomes 'co'.
'with' means one lot of letters goes inside another.
'assembly' indicates anagramming the letters.
'full' anagrammed gives 'lful'.
'our' put within 'lful' is 'lourful'.
'co'+'lourful'='COLOURFUL'
Can you help me to learn more?
(Other definitions for colourful that I've seen before include "Having striking hues" , "Lively, exciting" , "Vivid and distinctive" , "Containing lots of swear-words (of language)" .)