Figure a complaint to be general (5)
I believe the answer is:
vague
'be general' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for vague that I've seen before include "Indefinite" , "Indeterminate" , "not focused" , "Uncertain, imprecise" , "Imprecise (in thought)" .)