Concealment of a beating (6)
I believe the answer is:
hiding
I believe this is a double definition.
'concealment' is the first definition.
(I know that hiding is a type of concealment)
'a beating' is the second definition.
(I've seen this before)
'of' acts as a link.
(Other definitions for hiding that I've seen before include "Harm, damage" , "Covering up" , "Concealment - severe defeat" , "corporal punishment" , "Trying to avoid" .)