Becoming; proper (6)
I believe the answer is:
decent
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">becoming</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">proper</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for decent that I've seen before include "Generous or modest" , "Fitting; satisfactory" , "Honourable or modest" , "Upright" , "Not immodest, generous" .)