How many letters does the top answer for “to form into ridges. shak.” have?

The most common answer is enridge (7 letters).

Crossword clue: to form into ridges. shak.

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

enridge 7 letters web-def

To form into ridges. Shak.

a form of enough. shak. 50% similar → enow

a form of salutation. shak. 50% similar → goodden

so as to form ridges. 50% similar → ridgingly