Under a RIS, as has already been mentioned, the controller tell the pilot about other traffic and then it's up to the pilot to decide what to do.
The problem is that if the controller gives nothing but the position of the other traffic it's probably because he or she doesn't know anything else about the target - and further info would only be guesswork and, potentially, wrong or misleading. Any traffic info given by clock code is going to be accompanied by the range - I can't think of any situation where this would not be the case.
If you want more info you can ask for updates if you cannot see the traffic.