East Mexicans bamboozled tax collector (9)
I believe the answer is:
exciseman
'tax collector' is the definition.
(I know that tax collector can be written as exciseman)
'east mexicans bamboozled' is the wordplay.
'east' becomes 'e' (abbreviation).
'bamboozled' indicates an anagram (I've seen this in other clues).
'mexicans' with letters rearranged gives 'xciseman'.
'e'+'xciseman'='EXCISEMAN'
(Other definitions for exciseman that I've seen before include "Tax official" , "Old smuggler's foe" , "Old customs official" , "former government agent" , "Duty collector (hist.)" .)