He's not particular who he orders about (7)

I believe the answer is:

general

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'not particular who he orders about' is the definition.
'general' can be an answer for 'not particular' (I've seen this in another clue). I am unsure of the remainder of the definition.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for general that I've seen before include "Leader" , "Usual; overall" , "blanket" , "Catholic" , "The senior officer is common and widespread" .)

I've seen this clue in the Evening Standard.

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