Bun (4)
I believe the answer is:
roll
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bun</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that bun can be written as roll)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for roll that I've seen before include "Gymnastic move; bread" , "Continuing success if one is on this" , "Flatten; register" , "Move on wheels - individual portion of bread" , "Eg, bap" .)