Military commander heading for Augusta, Georgia (3)
I believe the answer is:
aga
'military commander' is the definition.
(historical commander in some Muslim countries)
'heading for augusta georgia' is the wordplay.
'heading for' says to take the initial letters.
'georgia' becomes 'ga' ().
The initial letter of 'augusta' is 'a'.
'a'+'ga'='AGA'
(Other definitions for aga that I've seen before include "Chief officer" , "Type of stove" , "Turkish leader" , "In Turkey, an official" , "military leader" .)