Handy gear for processing plant (9)
I believe the answer is:
hydrangea
'plant' is the definition.
The answer is an example.
'handy gear for processing' is the wordplay.
'for processing' indicates anagramming the letters.
'handy'+'gear'='handygear'
'handygear' is an anagram of 'HYDRANGEA'.
(Other definitions for hydrangea that I've seen before include "Flower you would find in garden hay" , "Ornamental flowering shrub - handy gear (anag)" , "Shrub of the saxifrage family -- angry head (anag)" , "Showy flower" , "Plant's" .)