A little plain, dictionary description of language (5)
I believe the answer is:
indic
'language' is the definition.
(Indic is an example)
'a little plain dictionary description' is the wordplay.
'a little' indicates a hidden word (a little bit of the clue).
'INDIC' can be found hidden inside 'plain dictionary description'.
'of' acts as a link.
(Other definitions for indic that I've seen before include "Group of languages including Sanskrit" , "Like some tongues" , "Language" .)