How the "general" has command (7)

I believe the answer is:

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'command' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for overall that I've seen before include "generally speaking" , "It protects a worker" , "it protects clothes" , "Omnipotent" , "Comprehensive - protective garment" .)

I've seen this clue in the Evening Standard.

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