View round wing (7)
I believe the answer is:
opinion
'view' is the definition.
(synonyms)
'round wing' is the wordplay.
'round' becomes 'o' (o is a circular letter).
'wing' becomes 'pinion' (synonyms).
'o'+'pinion'='OPINION'
(Other definitions for opinion that I've seen before include "View, barrister's advice" , "View, judgement" , "Belief not founded on proof or certainty" , "Standpoint" , "Personal belief or judgment" .)