Soft food in time something that flies mysteriously rebuffed? (4)
I believe the answer is:
tofu
'soft food' is the definition.
(tofu is usually soft)
'time something that flies mysteriously rebuffed?' is the wordplay.
'time' becomes 't' (abbreviation).
'something that flies mysteriously' becomes 'UFO' (unidentified flying object).
'rebuffed?' is a reversal indicator (I've seen 'rebuffed' mean this).
'ufo' back-to-front is 'ofu'.
't'+'ofu'='TOFU'
'in' is the link.
(Other definitions for tofu that I've seen before include "Form of curd" , "Cheese-like vegetarian food" , "Soya bean food" , "Unfermented soya-bean curd" , "Unfermented soya bean curd" .)