Pleated collar (4)
I believe the answer is:
ruff
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pleated collar</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ruff that I've seen before include "Jacobean neckwear" , "High tight collar" , "Starched neck frill" , "Elizabethan or Jacobean neck adornment" , "Starched frill; fish" .)