Half staring chap cooked duck soup (8)
I believe the answer is:
gazpacho
'soup' is the definition.
(I've seen this before)
'half staring chap cooked duck' is the wordplay.
'half staring' becomes 'gaz' (I am not sure about this - if you are sure you should believe this answer much more).
'cooked' indicates anagramming the letters (letters cooked into a new form).
'duck' becomes 'o' (resembles zero - 'duck' in cricket).
'chap' is an anagram of 'pach'.
'gaz'+'pach'+'o'='GAZPACHO'
Can you help me to learn more?
(Other definitions for gazpacho that I've seen before include "Soup appears" , "dish best served cold" , "Spanish vegetable soup served cold" , "Chop Gaza chop up for soup" , "Spanish soup, served chilled" .)