Blade appropriate, we hear? (5)
I believe the answer is:
steel
'blade' is the definition.
(I know that blade can be written as steel)
'appropriate we hear?' is the wordplay.
'appropriate' becomes 'steal' (appropriate can mean to steal).
'we hear?' shows a homophone (sound like).
'steal' is a homophone of 'STEEL'.
(Other definitions for steel that I've seen before include "May be cold" , "nerve" , "Make hard and unfeeling" , "Strength, determination" , "Knife-sharpener" .)