Crossword Genius

Key officer (5)

Ross

I believe the answer is:

major

I believe this clue is a double definition.

'key' is the first definition.
(thesaurus)

'officer' is the second definition.
(type of military officer)

(Other definitions for major that I've seen before include "See 2" , "Officer - of greater importance" , "Military rank" , "Of considerable importance" , "Of great importance" .)

I've seen this clue in The Irish Independent, The Guardian and The Globe and Mail.
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