Officer not content, having criticised a bloomer (6)
I believe the answer is:
orchid
'a bloomer' is the definition.
(orchid is a kind of flowering plant)
'officer not content having criticised' is the wordplay.
I cannot really understand how this works, but
'not' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
'content' could be 'hi' (hi is a kind of content) and 'hi' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for orchid that I've seen before include "Exotic plant with unusually shaped flowers of vivid colour" , "Highly prized flower" , "Cor! hid in the flower" , "elaborate bloomer" , "Beautiful exotic flower" .)