One out at match displays neckwear (6,3)
I believe the answer is:
kipper tie
'neckwear' is the definition.
(I've seen this before)
'one out at match' is the wordplay.
'one out at' becomes 'kipper' (I am not sure about this - if you are sure you should believe this answer much more).
'match' becomes 'tie' (tie can mean a sporting fixture).
'kipper'+'tie'='KIPPER TIE'
'displays' is the link.
Can you help me to learn more?
(Other definitions for kipper tie that I've seen before include "Garish, very wide neckwear" , "Wide item of neckwear" , "Something loud put on" .)