Nothing pleasant being shelved (2,3)
I believe the answer is:
on ice
'being shelved' is the definition.
(I've seen this before)
'nothing pleasant' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'pleasant' becomes 'nice' ('nice' is associated in meaning with 'pleasant').
'o'+'nice'='ON ICE'
(Other definitions for on ice that I've seen before include "Awaiting decision" , "held back?" , "one way to serve gin" , "kept for later" , "delayed" .)