Variant of Belgian language (7)

I believe the answer is:

bengali

'language' is the definition.
(thesaurus)

'variant of belgian' is the wordplay.
'variant of' is an anagram indicator.
'belgian' with letters rearranged gives 'BENGALI'.

(Other definitions for bengali that I've seen before include "foreign language" , "Ethnic group and language of NE Indian subcontinent" , "Asian character" , "Indic language" , "may be Indian" .)

I've seen this clue in The Times.

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