Fine-tunes (6)
I believe the answer is:
tweaks
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fine-tunes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tweaks that I've seen before include "Pinches and twists sharply" , "Pinches and twists, perhaps nose" , "Pinches and twists, maybe a nose" , "Improves a little" , "Makes little adjustments" .)