Celebrate a champion's attributes for school (5)
I believe the answer is:
teach
'school' is the definition.
(I've seen this before)
'celebrate a champion's attributes' is the wordplay.
'attributes' indicates the answer is hidden within the clue (the answer forms a part or attribute of the clue).
'TEACH' is hidden within 'celebrate a champions'.
'for' is the link.
(Other definitions for teach that I've seen before include "Educate 4 across" , "Work with pupils" , "Blackbeard" , "Provide learning to" , "Convey knowledge to students" .)