Dastard (6)
I believe the answer is:
coward
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dastard</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for coward that I've seen before include "Composer of "Mad Dogs and Englishmen"" , "Blithe Spirit playwright" , "Person who shows fear or timidity" , "Person without courage" , "Noel ......, composer of ''Bitter Sweet''" .)