Support for climbing plants (7)
(Other definitions for pergola that I've seen before include "Bower" , "Arch for garden plants" , "Trellis-covered walk" , "Garden frame for climbers" , "Arched frame for climbing plants" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">support for climbing plants</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for trellis that I've seen before include "supporting frame" , "Support for creepers" , "climbers train on it" , "Lattice structure" , "Latticework for climbing plants" .)