Answer: doctoring

AnswerCrossword Clue
doctoringChange the content or appearance of (a document or picture) in order to deceive; falsify
doctoringRemove the sexual organs of (an animal) so that it cannot reproduce
doctoringRepair (a machine)
doctoringAlter the content of (a drink, food, or substance) by adding strong or harmful ingredients
doctoringTamper with (a ball) so as to affect its movement when pitched
doctoringthe act of falsifying e.g. a document
doctoringTreat (someone) medically