As the weather isn't quite saying 'Italian summer', I've winter-fied a classic Campari Spritz, with the addition of sweet, citrusy clementines.
Fill a large wine glass with ice. Add the clementine juice, Campari, sparkling wine and if using, the sugar syrup (see notes).
Give everything a stir, then top up the glass with the soda water. Garnish with a slice or two of clementine, if you like.
This is a bitter cocktail (think negroni-esque), if you prefer things a bit sweeter, you could add the sugar syrup.
Recipe courtesy of georgieeats.co.uk