To begin with, friend always got into Indian dress for expedition (6)
I believe the answer is:
safari
'for expedition' is the definition.
(safari is a kind of expedition)
'to begin with friend always got into indian dress' is the wordplay.
'to begin with' suggests taking the first letters.
'got into' indicates putting letters inside.
'indian dress' becomes 'sari' (I've seen this in another clue).
The first letters of 'friend always' is 'fa'.
'fa' placed within 'sari' is 'SAFARI'.
(Other definitions for safari that I've seen before include "Overland journey by hunters" , "As fair as an African expedition" , "African hunting expeiditon" , "Expedition to see animals" , "Hunting journey" .)