Language in which "puzzle" is "puzal" (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
erse
(Other definitions for erse that I've seen before include "Old Scots or Irish Gaelic" , "Old Gaelic for the seer" , "Old language spoken by strange seer" , "Name sometimes given to languages of the Celts in Ireland and Scotland" , "Old name for Celtic languages" .)