Soon fixed (4)
I believe the answer is:
fast
This clue is a double definition.
'soon' is the first definition.
(thesaurus)
'fixed' is the second definition.
(synonyms)
(Other definitions for fast that I've seen before include "Avoid food; rapid" , "Of clock, ahead of correct time" , "Go without food" , "sort of convenience food" , "Tight; quick" .)