Cipher (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cipher</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that cipher can be written as code)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for code that I've seen before include "System of signals" , "Collection of laws" , "(Computer) programming instructions" , "See 21 Across" , "Ethical standards" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cipher</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that cipher can be written as zero)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for zero that I've seen before include "Very bad visibility" , "Duck" , "A very low temperature" , "Nadir" , "hour for action" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cipher</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that cipher is a kind of encode)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for encode that I've seen before include "transform with substitutions?" , "Turn message into secret symbols" , "Put (message) into ciphers" , "Put into cipher" , "Put into cypher" .)