The German Federal Court (BGH) has actually already dealt with this term: Clean and tidy or besenrein means that coarse soiling such as cobwebs or food leftovers must be removed.
If you tidy the apartment and vacuum it, dispose of garbage, leftovers and groceries, remove personal items such as shampoo and the like, your target is met. You do not have to clean as long as the degree of soiling is normal.