Fair fa' your honest, sonsie face,
Great chieftain o the puddin'-race!
Aboon them a' ye tak your place,
Painch, tripe, or thairm:
Weel are ye wordy of a grace
As lang's my arm.
It's not a very good clue - 'plenty, buxomness etc' are nouns yet the poem mentions 'sonsie face' - sonsie being an adjective. I'm sure sonse is the answer they're looking for - at least I hope it is as mine's in the post:o)