Guard abandoning large cast (5)
I believe the answer is:
shied
'cast' is the definition.
(cast can mean to throw or shy)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for shied that I've seen before include "Cast" , "started" , "Flung, tossed" , "horse did this?" , "Thrown" .)