How many letters does the top answer for “do random, unplanned work or activities or spend time idly” have?

The most common answer is monkey (6 letters).

Crossword clue: do random, unplanned work or activities or spend time idly

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

monkey 6 letters wn-def

any of various long-tailed primates (excluding the prosimians)

potter 6 letters wn-def

a craftsman who shapes pottery on a potter's wheel and bakes them it a kiln

tinker 6 letters wn-def

do random, unplanned work or activities or spend time idly