Trellis (7)
(Other definitions for pergola that I've seen before include "Framework for climbers" , "Garden support" , "lattice" , "Lag rope (anag.)" , "Garden frame for climbers" .)
'trellis' is the definition.
(both can mean a mesh or framework)
This is the entire clue.
(Other definitions for lattice that I've seen before include "Structure with criss-cross strips" , "Ornamental framework" , "Fretwork, grille" , "Framework for window" , "Criss-cross pattern" .)
'trellis' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for mesh that I've seen before include "Net fabric" , "harmonise" , "Get engaged" , "Netting made of wire or thread" , "Work well together" .)