How many letters does the top answer for “suffering from a partial loss of memory” have?

The most common answer is amnesiac (8 letters).

Crossword clue: suffering from a partial loss of memory

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

amnesiac 8 letters wn-def

a person suffering from amnesia

amnesic 7 letters wn-def

a person suffering from amnesia

partial or total loss of memory 60% similar → amnesia