Ms Earhart reportedly dined better (10)
I believe the answer is:
ameliorate
'better' is the definition.
(to ameliorate is to make better)
'ms earhart reportedly dined' is the wordplay.
I cannot really understand how this works, but
'dined' could be 'ate' (I've seen this in another clue) and 'ate' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ameliorate that I've seen before include "Make (a bad thing) better" , "Make (something) better" , "seen to improve" , "Become better" .)