Itty-bitty (6)
I believe the answer is:
teensy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">itty-bitty</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that itty-bitty can be written as teensy)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for teensy that I've seen before include "- - -weensy" , "Tiny" , "Mini" , "Very small" , "Minute" .)