Starched (4)

I believe the answer is:
prim
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">starched</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for prim that I've seen before include "Affectedly formal" , "Old-maidish" , "Proper (type of rose?)" , "Stiffly correct" , "Proper or prissy" .)