Gloomy Aussie soldier, one working in the churchyard (11)
I believe the answer is:
gravedigger
This might be a double definition.
'gloomy aussie' is the first definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
'one working in the churchyard' is the second definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'soldier' is the link.
Can you help me to learn more?
(Other definitions for gravedigger that I've seen before include "One unearthing a plot" , "part in Hamlet" , "Cemetery worker" , "working in churchyard?" , "Sexton" .)