How many letters does the top answer for “a bank; a dike. sir w. temple.” have?

The most common answer is digue (5 letters).

Crossword clue: a bank; a dike. sir w. temple.

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

digue 5 letters web-def

A bank; a dike. [Obs.] Sir W. Temple.

a recital. sir w. temple. 50% similar → recite

impartiality. sir w. temple. 50% similar → impartialness

to dispirit. sir w. temple. 50% similar → unspirit