Guardian 25514

[mmmbobajob]

Hello.
Struggling with last clue, driving me nuts even though I suspect it is obvious.....
27D "One among kings to distinguish German corner?"
K_R_E_L
Kartell?
(K/A/R and Tell=distinguish)?
Confused because German corner is Kurve?

Thanks!

[ladyalex]

Is it an alternative spelling of cartel meaning corner the market rather than curve ?

I don't get this clue either, though it has been answered already on here as Kartell