Family purchasing flash old garment from the East (6)
I believe the answer is:
kimono
'garment from the east' is the definition.
'kimono' can be an answer for 'garment' (kimono is a kind of garment). I am unsure of the 'from the east' bit.
'family purchasing flash old' is the wordplay.
'family' becomes 'kin' (synonyms).
'purchasing' is an insertion indicator (some letters take possession of others).
'flash' becomes 'mo' (both mean a very short period of time).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'kin' enclosing 'mo' is 'kimon'.
'kimon'+'o'='KIMONO'
Can you help me to learn more?
(Other definitions for kimono that I've seen before include "Japanese style of robe or gown" , "Eastern robe" , "Jap. wrap" , "wrapper" , "Oriental gown" .)