Language used by Spanish Indians (5)
I believe the answer is:
hindi
'language' is the definition.
(Hindi is an example)
'used by spanish indians' is the wordplay.
'used by' indicates the answer is hidden within the clue.
'HINDI' is hidden within 'spanish indians'.
(Other definitions for hindi that I've seen before include "An official language of India" , "Language derived from Sanskrit" , "One of India's official languages" , "Language of northern India" , "Asian language" .)