Ground elder sides with design review going all the way back (4)
I believe the answer is:
weed
'ground elder sides with design review going' is the definition.
I can't tell whether this definition defines the answer.
'all the way back' is the wordplay.
'all' becomes 'dee' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'the way' becomes 'w' (Compass direction - West).
'back' is a reversal indicator.
'dee'+'w'='deew'
'deew' reversed gives 'WEED'.
Can you help me to learn more?
(Other definitions for weed that I've seen before include "Work in garden" , "Plant growing where it is not wanted" , "Cannabis; feeble person" , "Got rid of water" , "Made water" .)