Nothing enjoyable should be postponed (2,3)
I believe the answer is:
on ice
'postponed' is the definition.
(I've seen this before)
'nothing enjoyable' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'enjoyable' becomes 'nice' (I've seen this before).
'o'+'nice'='ON ICE'
'should be' is the link.
(Other definitions for on ice that I've seen before include "one way to serve gin" , "Kept chilled" , "Shelved" , "Awaiting decision" , "Temporarily suspended" .)