How many letters does the top answer for “an honorary degree in science” have?

The most common answer is ds (2 letters).

Crossword clue: an honorary degree in science

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

ds 2 letters wn-def

an honorary degree in science

a bachelor's degree in science 50% similar → bs, sb

a master's degree in science 50% similar → sm

an honorary law degree 50% similar → lld