Menacing playwright leaves piano in Bury (5)
I believe the answer is:
inter
'bury' is the definition.
(to inter is to put into the ground)
'menacing playwright leaves piano in' is the wordplay.
I cannot really understand how this works, but
'in' is found in the answer.
The remaining letters 'ter' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for inter that I've seen before include "Nitre (anag.)" , "Prefix for between - bury it" , "Milan football team" , "Put under the earth" , "top Italian side" .)