There's an additional step you can take to make it look like a regular Wow shortcut if you don't want it getting lost among your other icons on your desktop/start menu lol. This is purely cosmetic as double clicking the .bat will perform the exact same task as this shortcut.
As said before, presumably you're running windows, this is what I do:
1. Open notepad and paste the following (if you want to include the regular npc cache as well feel free to)
If you wish to open the Launcher
Code:
@del "Cache\WDB\enUS\creaturecache.wdb"
@start C:\"Program Files"\"World of Warcraft"\"World of Warcraft Launcher.exe"
If you wish to open straight to the game
Code:
@del "Cache\WDB\enUS\creaturecache.wdb"
@start C:\"Program Files"\"World of Warcraft"\"WoW.exe"
2. Save it "name.bat" into where ever your game is installed
3. Right click on an empty space in your Wow folder > New > Shortcut
4. The wizard will ask you what file you want to set as a destination for your shortcut. Navigate to your "name.bat" notepad file you just made in your Wow folder and name this shortcut whatever you want and click Finish.
5. Right click your shortcut you just made > Properties > Shortcut tab > Change Icon > OK > Browse > pick either the game.exe or launcher.exe for the icon image > Open > OK > Apply
You now have a shortcut to the game, as you probably would have already, that performs that npccache code AND looks like wow to boot. I've been using this same method at least since the beginning of Cata when I started going rare crazy and it still works just fine.