Husband without weapon benign (8)
I believe the answer is:
harmless
'benign' is the definition.
(associated in meaning)
'husband without weapon' is the wordplay.
'husband' becomes 'h' (abbreviation).
'without weapon' becomes 'armless' ('weapon' can be 'arm' (synonyms) so maybe 'without weapon' can be ''armless').
'h'+'armless'='HARMLESS'
(Other definitions for harmless that I've seen before include "Not likely to cause damage" , "Benign, innocuous" , "Innocuous, innocent" , "Not posing any danger" , "Completely safe" .)