Express a view: nothing long (5)
I believe the answer is:
opine
'express a view' is the definition.
(I've seen this before)
'nothing long' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'long' becomes 'pine' (to pine for someone is to long for them).
'o'+'pine'='OPINE'
(Other definitions for opine that I've seen before include "Express one's view" , "State as one's belief" , "Give one's view" , "Conjecture" , "Proffer a view" .)