Sri Lankan male bitten by dog (5)
I believe the answer is:
tamil
'sri lankan' is the definition.
(I've seen this before)
'male bitten by dog' is the wordplay.
'male' becomes 'm' (common abbreviation).
'bitten by' means one lot of letters goes inside another (I've seen this in other clues).
'dog' becomes 'tail' ('tail' can be a synonym of 'dog').
'm' inserted within 'tail' is 'TAMIL'.
(Other definitions for tamil that I've seen before include "Dravidian people of India and Sri Lanka" , "Sri Lankan" , "An official language of Sri Lanka" , "South Indian people or language" , "S. India/Sri Lankan person, tongue" .)