Illustrate crossword clue have some optional answers.
DECIPHER – DECORATE – DOCUMENT – EMBLAZON – EVIDENCE – GO TO SHOW – INDICATE – INSTANCE – MANIFEST – ORNAMENT – PROCLAIM – SET FORTH – SIMPLIFY – SPELL OUT – DESCRIBE
But the correct one is DESCRIBE
provide (a book, newspaper, etc.) with pictures.
explain or make (something) clear by using examples, charts, pictures, etc.
serve as an example of.