How many letters does the top answer for “give or assign a resource to a particular person or cause” have?

The most common answer is appropriate (11 letters).

Crossword clue: give or assign a resource to a particular person or cause

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

appropriate 11 letters wn-def

suitable for a particular person or place or condition etc

earmark 7 letters wn-def

a distinctive characteristic or attribute