Chinese guy's endlessly bold (8)
I believe the answer is:
mandarin
'chinese' is the definition.
(Mandarin is an example)
'guy's endlessly bold' is the wordplay.
'guy' becomes 'man' (I've seen this before).
'endlessly' means to remove the last letter.
'bold' becomes 'daring' (I've seen this before).
'daring' with its final letter removed is 'darin'.
'man'+'darin'='MANDARIN'
(Other definitions for mandarin that I've seen before include "Bigwig" , "Language formerly used by educated Chinese, or a kind of orange" , "World's most spoken language" , "top official" , "High official in imperial China and a fruit" .)