He takes an age to get things under control (3)

I believe the answer is:

man

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'he' is the definition.
(I've seen this in another clue)

I can't explain the rest of the clue.

(Other definitions for man that I've seen before include "Male person" , "Isle of -; chess piece" , "Isle of ..., ... o'war" , "Soldier" , "Homo sapiens" .)

I've seen this clue in the Evening Standard.

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