Slightly OT: Is there a difference between the meaning of "clear to land"
between US and Europe?

The reason I ask is because while watching the traffic flow at FLL, I got
the impression landing clearance for airplane X was given even though there
were still other planes ahead, as soon as ATC is sure the separation is big
enough for safety. In contrast, up here ATC gives the landing clearance only
when the previous plane has actually vacated the runway.

- Nils,
at 60 degrees north