Totally beefy Scotsman? (5)
I believe the answer is:
angus
'scotsman?' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for angus that I've seen before include "man" , "A snug breed from Aberdeen" , "Former Scottish county" , "Scotsman" , "Lamb of God - . . . Dei" .)