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