Flower garden to some extent messed up when pruned (8)
I believe the answer is:
parterre
'flower garden' is the definition.
(I know that parterre is a type of flower garden)
'some extent messed up when pruned' is the wordplay.
I cannot quite see how this works, but
'some' could be 'part' (only part of something) and 'part' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for parterre that I've seen before include "Part of the main floor of a threatre" , "Seating on the main floor of a theatre" , "Seating on the ground floor of US theatre?" , "Formal area of garden" , "Formal garden - pit in theatre" .)