One's parents are late turning up for Chinese (6)
I believe the answer is:
orphan
'one's parents are late' is the definition.
'turning up for chinese' is the wordplay.
'turning up' is a reversal indicator.
'for' becomes 'pro' (I've seen this before).
'chinese' becomes 'han' (Chinese dynasty).
'pro' in reverse letter order is 'orp'.
'orp'+'han'='ORPHAN'
(Other definitions for orphan that I've seen before include "Child without parent" , "little Annie, maybe?" , "Child whose parents are dead" , "Oliver?" , "No harp (anag.)" .)