How many letters does the top answer for “working as a substitute for someone who is ill or on leave of absence” have?

The most common answer is subbing (7 letters).

Crossword clue: working as a substitute for someone who is ill or on leave of absence

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

subbing 7 letters wn-def

working as a substitute for someone who is ill or on leave of absence

substituting 12 letters wn-def

working as a substitute for someone who is ill or on leave of absence