Imaginative, inventive (8)
I believe the answer is:
creative
I believe this is a double definition.
'imaginative' is the first definition.
(similar in meaning)
'inventive' is the second definition.
(similar in meaning)
(Other definitions for creative that I've seen before include "Using the imagination" , "Full of ideas" , "Artistically inventive" , "Reactive in artistic manner" , "Showing originality" .)