
1) Clever person 2) Dutch rock music group 3) Slang for the skull 4) Slang for a clever person 5) Very clever person
Found on
https://www.crosswordclues.com/clue/brainbox

After Pierre van der Linden and Jan Akkerman left, Brainbox bass player Cyril Havermans also followed to join Focus, replacing the original bass player Martin Dresden. They were replaced by guitarists Herman Meyer and Rudie de Queljoe and drummer Frans Smit. Meyer was later replaced by John Schuursma. After Kaz Lux left the group in 1971, their po...
Found on
http://en.wikipedia.org/wiki/Brainbox

Brainbox is slang for the skull.
Found on
http://www.probertencyclopaedia.com/browse/ZBA.HTM
No exact match found.