Answer: gripers

AnswerCrossword Clue
GRIPERSOnes with beefs
GRIPERSThey squawk
GRIPERSGrumbling sorts
GRIPERSBeef sources
GRIPERSKvetches
GRIPERSComplaint department visitors
GRIPERSBitter complainers.
GRIPERSBeef producers
GRIPERSHard-to-please sorts
gripersGRIPER, one that gripes (to keep on complaining)