CATLH = LATCH

RILEN = LINER

SOMTAC = MASCOT

LAGEEL = ALLEGE

CARTOON ANSWER:

HE ERASED THE FORMULA FROM THE CHALKBOARD TO START OVER WITH A —

LCLNASTAEE = CLEAN SLATE

I’ll have to take a closer look at that chalkboard when the cartoon is published online to see if there were any hidden easter eggs on there.  Enjoy your Saturday!