The crossword solution for the term 'TALLY UP AGAIN' is 'READD'. This is an acronym for 'Re-evaluate And Estimate Data Differently', which is a process of re-evaluating and estimating data in order to get a more accurate result. This process is often used in accounting and other fields where accuracy is important. It involves going back over the data and making sure that all of the numbers are correct and that any discrepancies are accounted for. By doing this, it ensures that the final tally is as accurate as possible.