How many letters does the top answer for “a doctor's degree in religion” have?

The most common answer is dd (2 letters).

Crossword clue: a doctor's degree in religion

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

dd 2 letters wn-def

a doctor's degree in religion

a doctor's degree in medicine 50% similar → md

a doctor's degree in theology 50% similar → std

doctor's degree in osteopathy 50% similar → do