Explain reason for delayed arrival? Not I (9)
I believe the answer is:
translate
'explain' is the definition.
(I've seen this before)
'reason for delayed arrival? not i' is the wordplay.
I cannot really understand how this works, but
'delayed' could be 'late' (running late) and 'late' is present in the answer.
'i' could be 'a' and 'a' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for translate that I've seen before include "Interpret, render" , "Put into another language" , "Switch language" , "shift" , "Ten altars (anag.)" .)