View the duck feather (7)
I believe the answer is:
opinion
'view' is the definition.
(synonyms)
'the duck feather' is the wordplay.
'the duck' becomes 'o' (resembles zero - 'duck' in cricket).
'feather' becomes 'pinion' (pinion is a kind of feather).
'o'+'pinion'='OPINION'
(Other definitions for opinion that I've seen before include "Belief not founded on proof or certainty" , "View held without positive proof" , "Belief or conviction" , "'Judgment, view (7)'" , "Standpoint" .)