Crossword Genius

Central core of an atom (7)

Ross

I believe the answer is:

nucleus

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">central core of an atom</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(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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