Occurring repeatedly (9)
I believe the answer is:
recurrent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">occurring repeatedly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for recurrent that I've seen before include "Occurring repeatedly" , "Periodical" , "Coming round repeatedly" , "always coming back" , "Happening repeatedly" .)