It seems that Command-Shift-L were tied to safari. It is however also tied to "create bulleted list" in Word - which is an action I happen to (want to) do frequently.
How does one change or disable the built-in shortcuts for apps (in this case safari) ?
Update I found the following under system preferences | keyboard |shortcuts|apps
But as you can see there is nothing specific to Safari here.
Another update I just closed down Word and opened it up. The behavior seems to have been fixed: bullets are now appearing. It is very strange that the given key combo had been consistently and repeatably redirecting to safari before Word was restarted.
Yet another update This behavior recurs - even after restarting Word. The shortcut works a few times, then a bit later - and I do not understand what triggers the change in behavior - the shortcut changes behavior to launching Safari Just have no idea what is happening here.