% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for back up.

AnswerClue
BACKEDPatronized
BACKWord that can follow the start of 20-, 38- or 50-Across
BACKSee 36-Across
BACKLower-priced edition of a book
BACKShirt holder
BACKNo longer on vacation
BACKBet on
BACKEndorse
BACKBe an angel, on Broadway.
BACKDorsum
BACKFootball player.
BACK__ and forth
BACKPlayer in an I formation
BACKSee 1-Down
BACKGridiron runner
BACKSPuts money on
BACKINGSupport
BACKSSupports
BACKRecent novel by Henry Green.
BACKSGridiron players, behind the line.
BACKSMembers of a football team.
BACKFill's partner.
BACKShow support for
BACKLend support to
BACKEDWent to bat for
BACKFurnish with funds
BACKSGives support to
BACKS__ up (drives in reverse gear)
BACKQuarter, half or full
BACKWith 59 Down, a common misery
BACKWith 4-Down, "Likewise, dude!"
BACKEDGave support to
BACKEDChairlike
BACKFootball position
BACKGridiron yard-gainer
BACKHere again
BACKSupport
BACKEDSupported
BACKProvide support for
BACKEDBankrolled
BACKSPigskin carriers
BACKSBehind-the-line men
BACKGive support to
BACKIn the past
BACKWith 20-Across, working again, aptly
BACKOverdue, as pay
BACKSEndorses
BACKFro
BACKSBall carriers
BACKWhat a left arrow might mean