Put dinner on list, include prima donna and top athlete (9)
I believe the answer is:
medallist
'prima donna and top athlete' is the definition.
I can't tell whether this defines the answer.
'put dinner on list include' is the wordplay.
'put' becomes 'd' (I can't explain this - if you can you should believe this answer much more).
'dinner' becomes 'meal' (dinner is a meal).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'include' means one lot of letters goes inside another.
'meal'+'list'='meallist'
'd' going within 'meallist' is 'MEDALLIST'.
Can you help me to learn more?
(Other definitions for medallist that I've seen before include "Olympic winner" , "Prizewinner" , "Successful sportsperson" , "Award winner" .)