Obvious it's not in code (5)
I believe the answer is:
clear
This clue is a double definition.
'obvious' is the first definition.
(similar in meaning)
'not in code' is the second definition.
(I've seen this in another clue)
'it's' acts as a link.
(Other definitions for clear that I've seen before include "Patent" , "Transparent - free of obstruction" , "Obvious; jump over" , "Understandable" , "Distinct - obvious" .)