Quietly trimmed red bush (5)
I believe the answer is:
shrub
'quietly trimmed red bush' is the definition.
'shrub' can be an answer for 'bush' (synonyms). I am not sure about the 'quietly trimmed red' bit.
'red bush' is the wordplay.
I cannot quite understand how this works, but
'red' could be 'r' (I've seen this in other clues) and 'r' is present in the answer.
an anagram of 'bush' is 'shub' which is located in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for shrub that I've seen before include "Hazel perhaps" , "Small woody tree" , "Perhaps Heather" , "Low woody perennial type of plant" , "Small woody plant" .)