Thinly peel the oranges in long strips with a vegetable peeler, taking care not to include any pith. Cut the strips into 1/4-inch segments. Put the orange peels and the clove into a 1-quart mason jar, top with the brandy, and seal. Shake the jar to mix and set it aside in a cool, dark place for 10 days. Strain the liquid through a fine sieve into a 4-cup glass measuring cup and discard the solids. Rinse the sieve and the Mason jar thoroughly. Fit the sieve with a damp coffee filter and strain the flavored brandy back into the jar. Combine the sugar and water in a small saucepan. Heat for about 5 minutes over low heat, stirring constantly, just to the boiling point. Remove the pan from the heat and let the sugar syrup cool for 5 minutes. Add the sugar syrup and glycerin to the flavored brandy. Reseal the Mason jar and shake it gently to blend. If you wish, transfer the liqueur to a decanter. The Orange Brandy Cordial should be ready to drink in 2 or 3 days and has a shelf life of 2 to 3 months.