Spirited, bitter article missing heaps in hindsight (7)
I believe the answer is:
dynamic
'spirited' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for dynamic that I've seen before include "Powerful and vigorous" , "Energetic, with great force of character" , "High-powered" , "Having power" , "Go-getting" .)