Amin turned to ice, almost? That's daft! (7)
I believe the answer is:
idiotic
'that's daft' is the definition.
(I've seen this in another clue)
'amin turned to ice almost?' is the wordplay.
'amin' becomes 'idi' (I've seen this in other clues).
'turned' shows that the letters should be reversed in order.
'almost?' means to remove the last letter (I've seen 'almost' mean this (most of the word but not all of it)).
'to' reversed gives 'ot'.
'ice' with its final letter taken off is 'ic'.
'idi'+'ot'+'ic'='IDIOTIC'
(Other definitions for idiotic that I've seen before include "Silly" , "Senseless" , "without any point" , "Mindless" , "Altogether nonsensical" .)