Cut the grass around everything but this plant (6)
I believe the answer is:
mallow
'this plant' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'cut the grass around everything' is the wordplay.
'cut the grass' becomes 'mow' (I've seen this in another clue).
'around' is an insertion indicator.
'everything' becomes 'all' (all things).
'mow' placed around 'all' is 'MALLOW'.
'but' acts as a link.
Can you help me to learn more?
(Other definitions for mallow that I've seen before include "Downy-leaved plant and Cork town" , "'Cork town, a plant and a sweet (6)'" , "Shrub" , "Hairy-stemmed plant" .)