Crossword Genius

Central core of an atom (7)

Ross

I believe the answer is:

nucleus

'central core of an atom' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for nucleus that I've seen before include "Atomic core" , "central component" , "Central mass of a cell" , "Tiny factor" , "Central part of thing - ask us, uncle" .)

I've seen this clue in the Sydney Morning Herald.
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