Field event record set by us (6)
I believe the answer is:
discus
'field event' is the definition.
(discus is a kind of field event)
'record set by us' is the wordplay.
'record set' becomes 'disc' (I've seen this in other clues).
'by' says to put letters next to each other.
'disc'+'us'='DISCUS'
(Other definitions for discus that I've seen before include "sports equipment" , "Olympic throwing event" , "Round object thrown in sport" , "Throwing plate" , "Athletics field event" .)