Record in field event — not American (4)
I believe the answer is:
disc
'record' is the definition.
('disc' can be a synonym of 'record')
'field event not american' is the wordplay.
'field event' becomes 'discus' (discus is a kind of field event).
'not' suggests deleting specific letters.
'american' becomes 'us'.
'discus' with 'us' removed is 'DISC'.
'in' is the link.
(Other definitions for disc that I've seen before include "Record, CD" , "Circle" , "One of 33, 45 or 78?" , "Flat thin circular body" , "CD perhaps" .)