IRAs stands for Individual Retirement Accounts. It is a type of savings account that is designed to help individuals save for their retirement. Contributions to an IRA are typically tax-deductible, and the funds grow tax-deferred until they are withdrawn during retirement. The clue "Nest eggs, in brief" is referring to IRAs as a way to save money for the future, similar to how a nest egg represents savings or assets.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: SEP and Roth, for two. Explanations are generated by AI and may be inaccurate.