Answer: ifall

AnswerCrossword Clue
IFALL

"... else fails..."

IFALL".. else fails . . ."
IFALL

"... to Pieces" (Patsy Cline hit)

IFALL

"... goes according to plan..."

IFALL
"... else fails ..."
IFALL
Patsy Cline's "... to Pieces"
IFALL"... else fails . . ."
IFALLPatsy Cline's "-- to Pieces"
IFALL".. goes well ..."