Beef sandwiches right for winger (4)
I believe the answer is:
crow
'winger' is the definition.
(something with wings)
'beef sandwiches right' is the wordplay.
'beef' becomes 'cow' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'sandwiches' indicates putting letters inside (inserted letters are sandwiched in).
'right' becomes 'r' (common abbreviation).
'cow' going around 'r' is 'CROW'.
'for' is the link.
Can you help me to learn more?
(Other definitions for crow that I've seen before include "Express gleeful triumph" , "One joins others in a murder" , "Brave" , "Gloat" , "Blow one's own trumpet" .)