Protective clothing taken from peculiar mourners (6)
I believe the answer is:
armour
'protective clothing' is the definition.
(I've seen this before)
'from peculiar mourners' is the wordplay.
'from' indicates the answer is hidden within the clue.
'ARMOUR' can be found hidden inside 'peculiar mourners'.
'taken' is the link.
(Other definitions for armour that I've seen before include "Knight's attire" , "Protective clothing" , "Protective body-plating" , "Soldier's body protection" , "defence" .)