Cook time includes getting the pot up to pressure and the manual quick release of the steam.
Put ginger, lemon, cinnamon, cloves and elderberries in the Instant Pot. Add the water.
Put the lid on and set the vent to "SEALING".
Cook on MANUAL for 10 minutes.
Do a quick pressure release, remove the lid, and set to "SAUTE". Boil the syrup for 10 minutes, until the liquid is reduced by half.
Pour through a strainer, mashing on the berries with a spatula until all the liquid is released. Make sure you throw the berries away (in the trash or in the compost) as they are not safe to eat.