Fudge alternative (4)
I believe the answer is:
drat
'fudge alternative' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for drat that I've seen before include "blast" , "Mild expletive" , "Expression of mild annoyance" , "Informal expression of annoyance" , "Expression of annoyance on DART" .)