Chopped up half of garden pole to make frame for plants (7)
I believe the answer is:
pergola
'frame for plants' is the definition.
(framework which plants are grown in)
'chopped up half of garden pole' is the wordplay.
'chopped up' indicates an anagram.
'half of' suggests halving the letters.
'garden' halved is 'gar'.
'gar'+'pole'='garpole'
'garpole' with letters rearranged gives 'PERGOLA'.
'to make' is the link.
(Other definitions for pergola that I've seen before include "Garden archway" , "Arch for climbing plants" , "Frame for trailing plants" , "Lag rope (anag.)" , "This'll support climbers" .)