Sitting in sun around garden yard (9)
I believe the answer is:
sedentary
'sitting' is the definition.
(thesaurus)
'sun around garden yard' is the wordplay.
'sun' becomes 'star' (I've seen this before).
'around' means one lot of letters goes inside another.
'garden' becomes 'eden' (Garden of Eden in the Bible).
'yard' becomes 'y' (abbreviation).
'star' going around 'eden' is 'sedentar'.
'sedentar'+'y'='SEDENTARY'
'in' is the link.
(Other definitions for sedentary that I've seen before include "Tending to spend too much seated and taking little exercise" , "Yes, red ant could be sitting" , "Sitting a lot and taking little exercise" , "not exercising one's talents?" , "Tending to stay seated" .)