Large piece of beefcake (4)
I believe the answer is:
hunk
'beefcake' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'large piece' is the wordplay.
'large' becomes 'hun' (I can't justify this - if you can you should give a lot more credence to this answer).
'piece' becomes 'k' (abbreviation for King).
'hun'+'k'='HUNK'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for hunk that I've seen before include "Large unshaped piece" , "Large lump - sexy man" , "Large roughly-cut piece, or a sexy man" , "Rough piece; attractive man (slang)" , "Well-built sexually attractive man" .)