An artist might do so in a quiet churchyard (4)
I believe the answer is:
etch
'an artist might do' is the definition.
I can't judge whether this definition defines the answer.
'in a quiet churchyard' is the wordplay.
'in' indicates a hidden word.
'ETCH' is hidden in the letters of 'quiet churchyard'.
'so' is the link.
Can you help me to learn more?
(Other definitions for etch that I've seen before include "Design by eating out" , "Delineate" , "Corrode" , "Make picture by engraving metal" , "Make a deep impression" .)