Enjoying continuing success (2,1,4)
I believe the answer is:
on a roll
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">enjoying continuing success</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for on a roll that I've seen before include "Enjoying a winning streak" , "Being extremely jammy, maybe" , "Where toilet paper may be found" , "continually successful" , "enjoying continuing success" .)