Some favour Dutch as a language (4)
I believe the answer is:
urdu
'a language' is the definition.
(Urdu is an example)
'some favour dutch as' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'URDU' can be found hidden inside 'favour dutch as'.
(Other definitions for urdu that I've seen before include "Official language used in Pakistan" , "Sanskrit language" , "speech" , "Channel to north of Isle of Wight" , "Sub-continental language" .)