Notice was about something found in the playground (6)
I believe the answer is:
seesaw
'in the playground' is the definition.
('seesaw' is part of 'playground')
'notice was about something' is the wordplay.
I cannot quite understand how this works, but
'notice' could be 'see' (notice can mean to spot or see) and 'see' is found within the answer.
an anagram of 'was' is 'saw' which is within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'found' is the link.
Can you help me to learn more?
(Other definitions for seesaw that I've seen before include "youngsters' game" , "Teeter-totter" , "Playground equipment for kids" , "entertainment for children" , "vacillate in policy" .)