Garden lattice (7)
I believe the answer is:
trellis
'garden lattice' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for trellis that I've seen before include "Garden framework for climbers" , "Latticework structure" , "Framework for creepers" , "Arch of latticework" , "Plant-training lattice" .)