Infraction (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">infraction</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for breach that I've seen before include "Violation, maybe of the peace" , "Rupture, rift" , "The breaking of a law or agreement" , "Severance" , "Violation of a promise" .)