A word ending with the Instrumental -3rd case-affix and denoting a relish giving or refining ingredient, is compounded with a word meaning, victuals and the resulting compound is tat-puruṣa ,
Anything eatable, whether hard or soft, is called भक्ष्य; its refinement is called मिश्रीकरणं. As गुडधानाः 'barley prepared with jaggery;' गुडपृथकाः 'flattened parched rice prepared with jaggery.'
The connection here also between the two words is established by a verb understood.,