Crossword Genius

Boffin's formula for e? (7)

Ross

I believe the answer is:

egghead

I'm a little stuck... Click here to teach me more about this clue!

'boffin's' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for egghead that I've seen before include "Brainy type" , "Very academic person" , "An intellectual (inf.)" , "Boffin" , "brain" .)

I've seen this clue in The Independent.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.