Trellis from the pier sale? (8)
I believe the answer is:
espalier
'trellis' is the definition.
(I know that espalier is a type of trellis)
'from the pier sale?' is the wordplay.
'from' indicates an anagram (the anagram comes from the same letters).
'pier'+'sale'='piersale'
'piersale' with letters rearranged gives 'ESPALIER'.
(Other definitions for espalier that I've seen before include "train a plant" , "fruit tree forced flat" , "Kind of trellis for pearlies" , "Trained fruit-tree" , "Trellis on which shrubs are trained, like pearlies" .)