Answer: pet

AnswerCrossword Clue
PETBad mood
PETAsta, to Nick and Nora
PETTerm of endearment
PETHousesitter's company
PETOne that eats from bowls
PETCollar wearer
PETWater-bowl user (or the start of a film and TV actor's split personality)
PETSpa visitor who doesn't pay the bill?
PETFurry adoptee
PETAnimal companion
PETTreat like a dog?
PETApple of one's eye
PETCherished
PETGarfield, to Jon
PETHousecat, for one
PETHousehold animal
PETVet's patient
PETParakeet, perhaps
PETFurry friend
PETPal with paws
petfavorite
PETTeacher's favorite
PETDino, to Fred and Wilma
PETFavorite
PETTarantula, sometimes
PETVet visitor
PETCat or dog
PETGerbil or hamster
PETStroke gently
PETSulking fit
PETCaress
PETClass favorite
PETCreature of comfort
PETSnoopy, e.g.
PETFido or Felix
PETLassie, to Timmy
PETDarling
PETFave
PETClassroom favorite
PETFamily dog