Overhaul not to be considered before March (7)
I believe the answer is:
outpace
'overhaul' is the definition.
(thesaurus)
'not to be considered before march' is the wordplay.
'not to be considered' becomes 'out' ('that's out').
'before' is a charade indicator (letters next to each other).
'march' becomes 'pace' (I've seen this in other clues).
'out'+'pace'='OUTPACE'
(Other definitions for outpace that I've seen before include "Walk faster than" , "Excel in speed" , "Overcome by speeding" , "Go faster than" .)