Hide in plain sight: you build a secret lab or medical facility, in coopearation with the dwarven military to research "X", but you really research "Y".
After a while, the dwarven military start noticing the smell of that special plant or compound used to research "Y". The smell draws attention and questions...what does that rare plant or flower have anything to do with "X"?

Hide in plain sight: you build a secret lab or medical facility, in cooperation with the dwarven military to research "X", but you really research "Y".
After a while, the dwarven military start noticing the smell of that special plant or compound used to research "Y". The smell draws attention and questions...what does that rare plant or flower have anything to do with "X"?