Drop in and cry out there's easy money for it (3,4)
I believe the answer is:
old rope
But I can't explain it at all! Could you help me understand?
(Other definitions for old rope that I've seen before include "Money for . . . . . . . is easily earned" , "Money for . . . . . . . Is easily made" , "Easy money if you get it for this" , "Oakum" , "supplied for easy money?" .)