Most bashful (6)
I believe the answer is:
shyest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most bashful</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(Other definitions for shyest that I've seen before include "Most diffident" , "withdrawn the most" , "Most reticent" , "Most bashful or self-conscious" , "shrinking the most?" .)