How many letters does the top answer for “a settled and monotonous routine that is hard to escape” have?

The most common answer is groove (6 letters).

Crossword clue: a settled and monotonous routine that is hard to escape

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

groove 6 letters wn-def

a settled and monotonous routine that is hard to escape

rut 3 letters wn-def

a settled and monotonous routine that is hard to escape

hard monotonous routine work 50% similar → donkeywork, drudgery, plodding