The crossword solution for the term 'JUST ___ SWIMMING' is 'KEEP'. This is a four-letter word that can be used as a verb or a noun. As a verb, it means to hold onto something or to maintain possession of something. As a noun, it refers to the act of holding onto something or the state of being maintained. In this context, the phrase 'JUST KEEP SWIMMING' is a reference to the 2003 Pixar movie Finding Nemo, in which the main character, a fish named Nemo, is repeatedly told by his father to 'JUST KEEP SWIMMING' when faced with difficult situations.