Bring sugar, ginger, and 3 Tbsp. water to a boil in a small saucepan over high heat; cook 2 minutes, stirring occasionally.
Remove from heat; discard ginger.
Pour syrup over clementine sections.
Serve with gingersnaps.Note: Clementines will not have juice to add to the syrup, but there will still be enough syrup at the end of Step 1 to coat fruit.