Tight; average (4)
I believe the answer is:
mean
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">tight</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that tight can be written as mean)</span><br/ ><br/ >'<span class="explanation-format__original">average</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(type of average)</span><br/ ><br/ ></span>
(Other definitions for mean that I've seen before include "Despicable" , "Name for being tight-fisted" , "Intend; not generous" , "Intend; unkind" , "Name for being stingy" .)