Defeat in Olympic field event (6)
I believe the answer is:
hammer
This clue could be a double definition.
'defeat in olympic field' is the first definition.
'hammer' can be an answer for 'defeat' (I've seen this before). I am not certain of the 'in olympic field' bit.
'event' is the second definition.
(hammer is a kind of event)
Can you help me to learn more?
(Other definitions for hammer that I've seen before include "Metal ball thrown in athletics" , "Clawed tool?" , "Tool for nails" , "A striking tool for blacksmith" , "Thrash; gavel" .)