T, on a test (4)
I believe the answer is:
true
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">t on a test</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for true that I've seen before include "Dependable -- loyal" , "Real, actual" , "Real; accurate" , "Genuine, actual" , "to be believed?" .)