Answer: conserves

AnswerCrossword Clue
CONSERVESJams.
conservesPrevent the wasteful or harmful overuse of (a resource)
conservesRetain (a particular amino acid, nucleotide, or sequence of these) unchanged in different protein or DNA molecules
conservesProtect (something, esp. an environmentally or culturally important place or thing) from harm or destruction
conservesPreserve (food, typically fruit) with sugar
conservesCONSERVE, to preserve (to keep safe from harm)
conservesMaintain (a quantity such as energy or mass) at a constant overall total