Bizarre reason for eating good fruit (7)
I believe the answer is:
oranges
'fruit' is the definition.
(oranges are a type of fruit)
'bizarre reason for eating good' is the wordplay.
'bizarre' indicates anagramming the letters.
'for eating' means one lot of letters goes inside another.
'good' becomes 'g' (abbreviation).
'reason' is an anagram of 'oranes'.
'oranes' placed around 'g' is 'ORANGES'.
(Other definitions for oranges that I've seen before include "a zesty lot" , "They are not the only fruit, wrote Jeanette Winterson" , "Mandarins, satsumas etc." , "Go snare these fruits" , "Citrus fruits" .)