Organic can modify a single noun like raspberry. The resultant unit can then itself be used as a modifier of fruit spread. That would yield [[organic raspberry] [fruit [spread]]], denoting a fruit spread of the organic raspberry type. Perfectly grammatical; nothing amiss.
The difference is that the stuff referred to by this description needn’t fully satisfy the stringent conditions for being an organic product. Only the raspberries need to pass. And sure enough, the label on Nature’s Promise Organic Raspberry Fruit Spread says:
INGREDIENTS: ORGANIC SUGAR, ORGANIC RASPBERRIES, WATER, FRUIT PECTIN, CITRIC ACID, CALCIUM CHLORIDE.