Hindi people’s old symbol (4)
I believe the answer is:
logo
'symbol' is the definition.
(logo is a kind of symbol)
'hindi people's old' is the wordplay.
'hindi people' becomes 'log' (I can't justify this - if you can you should give a lot more credence to this answer).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'log'+'o'='LOGO'
Can you help me to learn more?
(Other definitions for logo that I've seen before include "Symbolic design" , "Printed symbol as organisation's emblem" , "Corporate symbol" , "Emblematic design" , "A company's printed symbol or emblem" .)