The term 'allowance after tare' refers to the amount of weight that is allowed for a container after the tare weight has been subtracted. Tare is the weight of the container itself, and the allowance after tare is the amount of weight that can be added to the container without exceeding its maximum capacity. The crossword solution for this term is 'TRET', which stands for 'tare reduction'. This term is used in the shipping industry to refer to the amount of weight that can be added to a container after the tare weight has been subtracted.