Neck shown by lawyer taking on charitable event (5)

I believe the answer is:
scrag
'neck' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for scrag that I've seen before include "End of neck - beat up" , "Bony part of the neck" , "Collar" , "The inferior end of a neck of mutton" , "Poor quality meat - throttle" .)
