Your duty-bound language (4)
I believe the answer is:
urdu
'language' is the definition.
(Urdu is an example)
'your duty-bound' is the wordplay.
'URDU' is hidden in amongst the letters.
But, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for urdu that I've seen before include "Sanskrit language" , "Sub-continental language" , "Indic language written in Persian script" , "Channel to north of Isle of Wight" , "Language spoken by Moslems in Pakistan and India" .)