Wavy, winding (7)
I believe the answer is:
sinuous
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">wavy</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">winding</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 sinuous that I've seen before include "Supply bending; wavy" , "Twisting and turning" , "Lithe, supple; curvy" , "Curving in and out" , "Serpentine" .)