Crossword Genius

Minister shown round a nuclear facility (7)

Ross

I believe the answer is:

reactor

'nuclear facility' is the definition.
(I've seen this before)

'minister shown round a' is the wordplay.
'minister' becomes 'rector' ('rector' can be a synonym of 'minister').
'shown round' is an insertion indicator.
'rector' enclosing 'a' is 'REACTOR'.

(Other definitions for reactor that I've seen before include "Device to produce energy by nuclear fission" , "nuclear facility" , "Creator (anag.)" , "Producer of nuclear energy" , "(Nuclear) powerplant" .)

I've seen this clue in The Times.
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