Asian male in shadow (5)
I believe the answer is:
tamil
'asian' is the definition.
(I know that Tamil is a type of Dravidian)
'male in shadow' is the wordplay.
'male' becomes 'm' (common abbreviation).
'in' is an insertion indicator.
'shadow' becomes 'tail' (both can mean to follow someone).
'm' going inside 'tail' is 'TAMIL'.
(Other definitions for tamil that I've seen before include "Language of southern India and Sri Lanka" , "Asian language" , "Member of South Indian people" , "Perhaps Indian" , "S. India/Sri Lankan person, tongue" .)