Chicken brought round in cargo helicopter (7)
I believe the answer is:
chinook
'chicken' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'brought round in cargo helicopter' is the wordplay.
'brought round' is an insertion indicator.
'cargo helicopter' becomes 'chook' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' inserted within 'chook' is 'CHINOOK'.
Can you help me to learn more?
(Other definitions for chinook that I've seen before include "North American wind, native or language" , "Warm dry wind of the Rockies and type of helicopter" , "Native American - wind - helicopter" , "warm one" , "O in hock (anag)" .)