More gin ordered by old chief (8)
I believe the answer is:
geronimo
'chief' is the definition.
(I know that Geronimo is a Indian chief)
'more gin ordered by old' is the wordplay.
'ordered' indicates anagramming the letters.
'by' is a charade indicator (letters next to each other).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'more'+'gin'='moregin'
'moregin' with letters rearranged gives 'geronim'.
'geronim'+'o'='GERONIMO'
(Other definitions for geronimo that I've seen before include "I'm no ogre like famous Apache Indian chief" , "shout during dive" , "American shout on jumping out of an aeroplane?" , "he's called for the high jump?" , "Brave leader" .)