Follow Indian language millions ignored (4)
I believe the answer is:
tail
'follow' is the definition.
(both can mean to chase or pursue)
'indian language millions ignored' is the wordplay.
'indian language' becomes 'tamil' (I've seen this in another clue).
'millions' becomes 'm' (abbreviation).
'ignored' suggests deleting specific letters.
'tamil' with 'm' removed is 'TAIL'.
(Other definitions for tail that I've seen before include "bum" , "Rump" , "Hindmost part" , "Animal's elongated appendage" , "that can be cast by a lizard" .)