Answer: flanking

AnswerCrossword Clue
FLANKINGRuler with custard desserts?
flankingFLANK, to be situated to the side of
flankingGuard or strengthen (a military force or position) from the side
flankingAttack down or from the sides, or rake with gunfire from the sides
flankingBe situated on each side of or on one side of (someone or something)