Shock, as fat brute eats starters of raw greens (11)
I believe the answer is:
flabbergast
'shock' is the definition.
(thesaurus)
'as fat brute eats starters of raw greens' is the wordplay.
I cannot really see how this works, but
'as' is found in the answer.
'fat' could be 'flab' (flab is a kind of fat) and 'flab' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for flabbergast that I've seen before include "Surprise greatly" , "Astound" , "floor" , "Strike dumb" , "stunning" .)