How many letters does the top answer for “to put to difficulties. shak.” have?

The most common answer is strait (6 letters).

Crossword clue: to put to difficulties. shak.

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

strait 6 letters web-def

a narrow channel of the sea joining two larger bodies of water

to put an end to. shak. 50% similar → period

to put in agony. shak. 50% similar → throe

to put to silence. shak. 50% similar → dumb