This means worsted, oddly enough! (6)
I believe the answer is:
bested
'this means worsted' is the definition.
'bested' can be an answer for 'worsted' (I've seen this in another clue). I am unsure of the 'this means' bit.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for bested that I've seen before include "Defeated or outwitted" , "Worsted" , "Conquered, overcame" .)