Nothing followed piece for violin and cello because of this (3,2)
I believe the answer is:
due to
'violin and cello because of this' is the definition.
The definition suggests a singular noun but the answer is not.
'nothing followed piece' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'followed' says to put letters next to each other.
'piece' becomes 'duet' (duet is a kind of piece).
'o' put after 'duet' is 'DUE TO'.
'for' acts as a link.
Can you help me to learn more?
(Another definition for due to that I've seen is " Caused by".)