Answer: ifever

AnswerCrossword Clue
IFEVER

Words suggesting a rare occurrence

IFEVER

"In the unlikely event that ..."

IFEVER

Should it happen that

IFEVER
".. I Would Leave You"
IFEVER
In song, words before "a wiz there was"
IFEVERAssuming it'll happen at all
IFEVERAssuming, hypothetically
IFEVER"Should that come to pass"
IFEVERAssuming it's even possible
IFEVERAssuming it will happen at all
IFEVERIntensifier for "seldom"
IFEVERPerhaps not at all
IFEVERShould that happen