Culturally deficient person taking book aboard Central Line? (10)
I believe the answer is:
middlebrow
'culturally deficient person taking book aboard' is the definition.
I can't tell whether this definition defines the answer.
'central line?' is the wordplay.
'central' becomes 'middle' (similar in meaning).
'line?' becomes 'brow' (I am not sure about this - if you are sure you should believe this answer much more).
'middle'+'brow'='MIDDLEBROW'
Can you help me to learn more?
(Other definitions for middlebrow that I've seen before include "unadventurous culturally" , "Not very intellectual" , "Not too intellectually stretching" .)