Crossword Genius

Say, good source of protein (3)

Ross

I believe the answer is:

egg

'source of protein' is the definition.

'say good' is the wordplay.
'say' becomes 'eg'.
'good' becomes 'g' (abbreviation).
'eg'+'g'='EGG'

(Other definitions for egg that I've seen before include "nit? Just a bit!" , "Poultry product" , "On the face, it's embarrassing" , "Bomb or mine (sl.)" , "Food in a shell" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app