Military commander addressing General Assembly, first of all (3)

I believe the answer is:

aga

'military commander' is the definition.
(historical commander in some Muslim countries)

'addressing general assembly first of all' is the wordplay.
'first of all' says to take the initial letters.
The first letters of 'addressing general assembly' is 'AGA'.

(Other definitions for aga that I've seen before include "Kitchen range" , "Muslim title of honour" , "Turkish leader" , "Overseas commander" , "of the 17 [KITCHEN]" .)

I've seen this clue in The Telegraph.

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