Glove – challenge (8)
I believe the answer is:
gauntlet
This clue is a double definition.
'glove' is the first definition.
(I know that gauntlet is a type of glove)
'challenge' is the second definition.
(to take up the gauntlet is to accept a challenge)
(Other definitions for gauntlet that I've seen before include "Strong glove, thrown down in challenge" , "Glove of armoured leather, thrown down as a challenge" , "Knight's glove" , "What might represent a challenge" , "outdated military punishment" .)