Losing ground is a term that describes a situation in which something is deteriorating or becoming less successful. In this case, the crossword solutions for the term are ERODING (7 letters), SPA (3 letters), and FATFARM (7 letters). ERODING refers to the process of being worn away by wind, water, or other natural elements. SPA is an acronym for 'sanus per aquam', which is Latin for 'health through water'. Finally, FATFARM is a slang term for a weight loss retreat or program.