1999 Jeep Cherokee Leaks

Engine problem
1999 Jeep Cherokee V6 Four Wheel Drive Automatic 89567 miles
Garage name : A garage

My Jeep is leaking a lot from the front passanger side. Basically right under the radiator. The leak is significant at first then it stops completely. The fluid is a light brown, appears to be oil and something else? Perhaps water? I just paid $733 for a 90K service and tune up. They said they can find nothing. Yet as soon as I drove it home the leak started (once parked). I call the garage and they came out to see it. They took it away on a flat bed. Any clue what it is?