How many letters does the top answer for “used especially of persons” have?

The most common answer is stalwart (8 letters).

Crossword clue: used especially of persons

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

stalwart 8 letters wn-def

a person who is loyal to their allegiance (especially in times of revolt)

stouthearted 12 letters wn-def

used especially of persons

(used especially of persons) of inferior size 60% similar → puny, runty, shrimpy

used especially of behavior 50% similar → renunciant, renunciative

used especially of fabrics 50% similar → creaseless, uncreased