In Europe (and ICAO standards) the controller will say to the second plane "number 1, traffic departing ahead" to let them know and then only say "cleared to land" after the other plane has left the runway.
In the US this is a bit different, they will say "cleared to land, traffic departing ahead" and are trained to cancel the landing clearance if the other plane isn't off the runway fast enough.
In both cases the second plane is made aware of the first, so they're ready (should always be) for a missed approach.
In Europe (and ICAO standards) the controller will say to the second plane "number 1, traffic departing ahead" to let them know and then only say "cleared to land" after the other plane has left the runway.
In the US this is a bit different, they will say "cleared to land, traffic departing ahead" and are trained to cancel the landing clearance if the other plane isn't off the runway fast enough.
In both cases the second plane is made aware of the first, so they're ready (should always be) for a missed approach.