Specialised corner of the market (5)
I believe the answer is:
niche
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">specialised corner of the market</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 niche that I've seen before include "Special location" , "Specialised corner of the market" , "Recess - suitable position" , "A small recess or easy job" , "Specialized market" .)