Answer: wingit

AnswerCrossword Clue
WINGIT

Abandon the plan

WINGIT

Skip the plan

WINGIT

Proceed without preparation

WINGIT
Ad-lib
WINGITAd lib
WINGIT
Improvise
WINGITManage somehow
WINGITPerform without preparation
WINGITExtemporize
WINGITNot go according to plan?
WINGITProceed without a game plan
WINGITFly by the seat of one's pants
WINGITIgnore the plan