When cleared to land your clearance limit is the runway, you are not cleared for the missed, the pattern or any combination thereof. If you need to go around a new clearance must be given, so follow ATC instructions, most times this will be more similar to a DP than an missed approach procedure as, in busy airspace, you will usually join the departing traffic sequence before returning for another try.
In some situations this may not apply, for instance, if on a "cruise" clearance (US Term, not sure about the rest of the world), if "cleared for approach" etc. etc., essentially, in any situation where the controlled clears you to the field and then terminates the radar service, necessitating you to provide your own navigation, you may fly however you wish to get the aircraft onto the runway, and call the controlled when on the ground. Reason is that ATC has cleared the airspace for you of any traffic they control and you are responsible to keep yourself separated from the rest. As such, if you execute a GA you can simply join the traffic pattern and try again.