How many letters does the top answer for “accepted or habitual practice” have?

The most common answer is custom (6 letters).

Crossword clue: accepted or habitual practice

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

custom 6 letters wn-def

accepted or habitual practice

usance 6 letters wn-def

accepted or habitual practice