Language game needs new beginning (5)
I believe the answer is:
lingo
'language' is the definition.
(informal term for language)
'game needs new beginning' is the wordplay.
I cannot really understand how this works, but
'game' could be 'go' (go is a kind of game) and 'go' is present in the answer.
'new' could be 'n' (common abbreviation eg NT for New Testament) and 'n' is found in the answer.
The remaining letters 'li' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for lingo that I've seen before include "French?" , "local dialect" , "strange language" , "Unfamiliar language or jargon" , "means to communicate" .)