Chauffeur dutifully holding tongue (4)

I believe the answer is:

urdu

'tongue' is the definition.
(Urdu is a language or tongue)

'chauffeur dutifully holding' is the wordplay.
'holding' indicates the answer is hidden within the clue.
'URDU' can be found hidden inside 'chauffeur dutifully'.

(Other definitions for urdu that I've seen before include "Pakistani tongue" , "Indic language written in Persian script" , "An official language of Pakistan related to Hindi" , "Sub-continental language" , "Language closely related to Hindi" .)

I've seen this clue in The Telegraph.

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