Fine-tune; adjust (5)
I believe the answer is:
tweak
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">fine-tune</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">adjust</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for tweak that I've seen before include "Pull and twist" , "Make small adjustments" , "Fine-tune, twist" , "Modify slightly" , "Pinch sharply" .)