Centre for computers, say (3)
I believe the answer is:
put
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">say</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >'<span class="explanation-format__original">centre for computers</span>' is the wordplay.<br/ >'<span class="explanation-format__original">centre for</span>' indicates the central letters.<br/ >The central letters of '<span class="explanation-format__original">com<span class="explanation-format__em">put</span>ers</span>' are '<span class="explanation-format__answer">PUT</span>'.<br/ ></span>
(Other definitions for put that I've seen before include "Place; placed" , "Place in a location" , "Set (in place)" , "Place, lay" , "Place in a position" .)