Longed to promote journalist (stickler for accuracy) (6)
I believe the answer is:
pedant
'stickler for accuracy' is the definition.
(I've seen this before)
'longed to promote journalist' is the wordplay.
I cannot really understand how this works, but
'journalist' could be 'ed' (short for editor) and 'ed' is found within the answer.
The remaining letters 'pant' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pedant that I've seen before include "Know-all who insists on strict observance of rules" , "Academic stickler" , "A sticklet for formal rules and details" , "Panted (anag.)" , "one of the old school?" .)