How many letters does the top answer for “love of country and willingness to sacrifice for it” have?

The most common answer is nationalism (11 letters).

Crossword clue: love of country and willingness to sacrifice for it

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

nationalism 11 letters wn-def

love of country and willingness to sacrifice for it

patriotism 10 letters wn-def

love of country and willingness to sacrifice for it