Shock arrangement? (6)
I believe the answer is:
hairdo
'shock arrangement?' is the definition.
(shock can mean large mass of hair)
'shock arrangement?' is the wordplay.
'shock' becomes 'hair' (shock can mean a mass of hair).
'arrangement?' becomes 'do' (I can't explain this - if you can you should believe this answer much more).
'hair'+'do'='HAIRDO'
Can you help me to learn more?
(Other definitions for hairdo that I've seen before include "Arrangement of locks" , "Bob, perhaps" , "The process of styling head growth" , "Say, crew cut" , "Coiffure (colloq.)" .)