Flavourless (7)
I believe the answer is:
insipid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flavourless</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for insipid that I've seen before include "Dull" , "Bland, flavourless" , "Lacking 10" , "Lacking flavour or banal" , "Very weak" .)