Crossword Genius

Nuclear plants lacking atomic mass conductors? (7)

Ross

I believe the answer is:

rectors

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This might be a double definition.

'nuclear plants' is the first definition.
The definition and answer can be both people as well as being plural nouns.
Maybe there's a link between them I don't understand?

'lacking atomic mass conductors?' is the second definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps there's a link between them I don't understand?

Can you help me to learn more?

(Other definitions for rectors that I've seen before include "Clergymen" , "ministers" .)

I've seen this clue in The Telegraph.
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