Easily pulverised, using a bar file perhaps (7)
I believe the answer is:
friable
'easily pulverised' is the definition.
I can't tell whether this defines the answer.
'a bar file perhaps' is the wordplay.
'perhaps' indicates an anagram.
'bar'+'file'='barfile'
'barfile' anagrammed gives 'FRIABLE'.
'using' is the link.
Can you help me to learn more?
(Other definitions for friable that I've seen before include "Easily crumbled or crushed into powder" , "Easily broken down" .)