Recurrent, repeating (9)
I believe the answer is:
iterative
This clue is a double definition.
'recurrent' is the first definition.
(thesaurus)
'repeating' is the second definition.
(I've seen this before)
(Other definitions for iterative that I've seen before include "Relating to repetition" , "bears repeating" , "repeated" , "Involving repetition" .)