Pen story where gold goes missing (3)
I believe the answer is:
sty
'pen' is the definition.
(both can mean an animal enclosure)
I don't understand the rest of the clue.
(Other definitions for sty that I've seen before include "Swinish place" , "Animal pen" , "Porcine pen" , "Pigs' pen" , "Hog house" .)