Drunk is held for protection (6)
I believe the answer is:
shield
'for protection' is the definition.
(shield is a kind of protection)
'drunk is held' is the wordplay.
'drunk' is an anagram indicator.
'is'+'held'='isheld'
'isheld' anagrammed gives 'SHIELD'.
(Other definitions for shield that I've seen before include "Protective plate" , "Protector" , "Protective structure or device" , "Sporting trophy; protect" , "Plateau" .)