New Zealander seen in khaki windcheater (4)
I believe the answer is:
kiwi
'new zealander' is the definition.
(informal term for someone from New Zealand)
'in khaki windcheater' is the wordplay.
'in' indicates the answer is hidden within the clue.
'KIWI' can be found hidden inside 'khaki windcheater'.
'seen' acts as a link.
(Other definitions for kiwi that I've seen before include "apteryx" , "Hairy fruit with green flesh" , "Chinese gooseberry" , "New Zealander's bird" , "'Fruit, bird and NZ rugby player (4)'" .)