Limits to Prince adopting a language with royal attributes (8)
I believe the answer is:
palatine
'with royal attributes' is the definition.
(historical term meaning having royal powers)
'limits to prince adopting a language' is the wordplay.
'limits to' suggests removing the centre (only the edge letters are used).
'adopting' is an insertion indicator (inserted letters are taken on or adopted).
'language' becomes 'latin' (Latin is an example).
'prince' with its middle removed is 'pe'.
'a'+'latin'='alatin'
'pe' placed around 'alatin' is 'PALATINE'.
(Other definitions for palatine that I've seen before include "Having royal privileges" , "One of the seven hills of Rome" , "Hill" .)