Whose brain is smaller than the name suggests? (7)
I believe the answer is:
fathead
'smaller than the name suggests?' is the definition.
I can't judge whether this definition defines the answer.
'whose brain' is the wordplay.
'whose' becomes 'fat' (I can't explain this - if you can you should give a lot more credence to this answer).
'brain' becomes 'head' (synonyms).
'fat'+'head'='FATHEAD'
'is' is the link.
Can you help me to learn more?
(Other definitions for fathead that I've seen before include "Stupid person" , "silly ass!" , "Slang idiot with enlarged cranium?" , "Fool" , "Dimwit" .)