This is an oldie: the Clear key on the portables doesn't exist, IIRC  

This is someting to ask MM Support through the Submit a request link at the top of the page. Please post here whatever answer you get. 

I'm on a desktop Mac with an extended keyboard. 

So here I am with a brand new mac keyboard, default setting all articulation:-)
Strange that Apple designed Clear key only for desktops... The should at least have a key combination for it...
Sorry for MakeMusic who has to do the job for them...

I will let you know what happends.

Greatful for your response Mike.

Best regards Eljas//

It's part of the numeric keypad on the extended keyboard. 

The Belkin wireless keypad has the key. Many don't. 

http://www.bestbuy.com/site/belkin-yourtype-bluetooth-wireless-keypad-for-apple-imac-mac-pro-and-macbook-aluminum/4210322.p?skuId=4210322&cmp=RMX&extStoreId=685&ref=212&loc=1&ksid=57aa4ad4-8f2a-c249-730d-000029adcefa&ksprof_id=3&ksaffcode=pg218887&ksdevice=t&lsft=ref:212,loc:2&gclid=COvexLGhntQCFQmFaQodImMF8A

Yepp. Got Apples Extended keyboard with the Clear key.
All systems go.
Maybe I get the Belkin to. Nice to have something small when travelling.

Eljas//

Apple released a wireless keyboard with a numeric keypad and Clear key today. Finally!

https://www.apple.com/shop/product/MQ052LL/A/magic-keyboard-with-numeric-keypad-us-english?Email_OID=3b410fa06a345cdcb98c6f95312932387266d676b35edff8a2db292e156f4629&Email_PageName=P0018059-381199&cid=%5BCDM-US-DM-P0018059-381199&cp=em-P0018059-381199&sr=em

Magic Keyboard with Numeric Keypad features an extended layout, with document navigation controls for quick scrolling and full-size arrow keys for gaming. A scissor mechanism beneath each key allows for increased stability, while optimized key travel and a low profile provide a comfortable and precise typing experience. The numeric keypad is also great for spreadsheets and finance applications. And the built-in, rechargeable battery is incredibly long-lasting, powering your keyboard for about a month or more between charges.¹

Yippee!

I¨ll check and see if there is one with Swedish keyboard layout.
Next on wishlist would be the same keyboard with touchbar added:-)

Eljas//

>Next on wishlist would be the same keyboard with touchbar added:-)<

It did take them 7 years to release this one... If it happens, I would expect it when the iMac Pro is released at the end of this year. I am not holding my breath, right?