Fruitful aspects of flight, some say (6,3,5)
I believe the answer is:
apples and pears
'flight some say' is the definition.
'apples and pears' can be an answer for 'flight' (I've seen this before). I am not certain of the 'some say' bit.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for apples and pears that I've seen before include "London flight" , "Steps" , "taken by healthy eaters?" , "stairs in east London" , "Selection of fruit" .)