Pell-mell (6-7)
I believe the answer is:
helter-skelter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pell-mell</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that pell-mell can be written as helter-skelter)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for helter-skelter that I've seen before include "Fairground slide - confused" , "High spiral slide at fairground" , "In disorderly haste" , "Haphazardly" , "Spiralling fairground ride" .)