Into which Icarus fell and - they say - what caused that fall? (6)
I believe the answer is:
season
'that fall?' is the definition.
(fall is a kind of season)
'into which icarus fell and they say what caused' is the wordplay.
I cannot quite understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found within the answer.
'say' could be 'as' (I've seen this in other clues) and 'as' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for season that I've seen before include "Add salt, pepper, spices etc" , "Particular time (for activity, conditions etc)" , "Add flavouring" , "Add flavour with salt and pepper" , "Flavour food with salt, pepper etc" .)