Point about playground garden — an example to be followed (9)
I believe the answer is:
precedent
This clue might be a double definition.
'point about playground garden' is the first definition.
'precedent' can be an answer for 'point' (thesaurus). I'm unsure of the 'about playground garden' bit.
'an example to be followed' is the second definition.
(eg a legal precedent)
(Other definitions for precedent that I've seen before include "Relevant earlier case in law" , "Going before" , "Decision to return to" , "Example to follow" , "Previous case cited in court" .)