Shame over patch in the garden because of the last damage (6)
I believe the answer is:
debase
'shame' is the definition.
(thesaurus)
'over patch in the garden because of the last damage' is the wordplay.
'over' means one lot of letters go next to another.
'patch in the garden' becomes 'deb' (I can't justify this - if you can you should believe this answer much more).
'because' becomes 'as' (I've seen this in other clues).
'of the last' indicates one should take the final letters (I've seen 'the last of' mean this).
The final letter of 'damage' is 'e'.
'deb' next to 'as' is 'debas'.
'debas'+'e'='DEBASE'
Can you help me to learn more?
(Other definitions for debase that I've seen before include "Degrade or devalue" , "Lower, degrade" , "Degrade or demean" , "Lower in quality, reduce the value of" , "Depreciate or humiliate" .)