Want quiet in garden (4)
I believe the answer is:
hope
'want' is the definition.
(hoping is a kind of wanting)
'quiet in garden' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'in' is an insertion indicator.
'garden' becomes 'hoe' (to garden could mean to hoe).
'p' going inside 'hoe' is 'HOPE'.
(Other definitions for hope that I've seen before include "English-born US comedian, d. 2003" , "combination of expectation and desire" , "It goes with faith and charity" , "The last thing in Pandora's Box" , "Longing" .)