Provocation (10)
(Other definitions for red rag that I've seen before include "Bull incitor?" , "Reputed to annoy bull" , "It is offensive to a bull" , "Gerard (anag) - cause of infuriation" , "Proverbial bull enrager" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">provocation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that provocation can be written as incitement)</span><br/ ><br/ >This is the entire clue.<br/ ></span>