Buy in ___ (4)
I believe the answer is:
bulk
(Other definitions for bulk that I've seen before include "Mass - large quantity" , "Large mass; roughage" , "Majority" , "Mass of something large" , "Greater part" .)
I believe the answer is:
bulk
(Other definitions for bulk that I've seen before include "Mass - large quantity" , "Large mass; roughage" , "Majority" , "Mass of something large" , "Greater part" .)