Helicopter, say, used by good participant in shoot (9)
I believe the answer is:
eggbeater
'helicopter' is the definition.
(synonyms)
'say used by good participant in shoot' is the wordplay.
'say' becomes 'eg' (both can mean for example).
'used by' says to put letters next to each other.
'good' becomes 'g' (abbreviation).
'participant in shoot' becomes 'beater' (I am not sure about this - if you are sure you should believe this answer much more).
'eg'+'g'+'beater'='EGGBEATER'
Can you help me to learn more?
(Other definitions for eggbeater that I've seen before include "Kitchen utensil" , "Whisk" , "Kitchen gizmo" , "Meringue maker's tool" .)