Possible alternative to plastic monitor, we hear (6)
I believe the answer is:
cheque
'possible alternative to plastic' is the definition.
I can't tell whether this definition defines the answer.
'monitor we hear' is the wordplay.
'monitor' becomes 'check' (synonyms).
'we hear' shows a homophone (sound like).
'check' is a homophone of 'CHEQUE'.
Can you help me to learn more?
(Other definitions for cheque that I've seen before include "Method of payment" , "Bill of exchange" , "Bank draft" , "Personal bank order" , "Written document authorising payment to recipient" .)