@clee74 you need to query the item, get the number of clicks and increase it by 1.
Example:
wixData.query('col').find().then((x) => {
const item = x.items[0];
if (item) {
item.clicks += 1; // Increasing the number of clicks by 1;
// Save the item again.
wixData.update('col', item);
}
})