Gypsy language (6)
I believe the answer is:
romany
'gypsy language' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for romany that I've seen before include "Traveller" , "one of those travelling" , "Gypsy language" , "Roy, man, you're a gypsy" , "Language of gypsies" .)