Not made-to-measure (3-3-3)
I believe the answer is:
off-the-peg
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not made-to-measure</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for off-the-peg that I've seen before include "Ready-made, for immediate purchase" , "Not made-to-measure" , "Of clothes, bought ready to wear" , "(Of clothes) ready-to-wear" , "Of clothes, not made to measure, on the rack" .)