This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The act of pleading or arguing in favor of something, such as a cause, idea, or policy; active support.

n. the profession of an advocate

n. the act of arguing in favour of, or supporting something

n. the practice of supporting someone to make their voice heard

n. The act of pleading for or supporting; work of advocating; intercession.

n. The act of pleading for, supporting, or recommending; active espousal.

n. A lawsuit; a plea or pleading: as, “advocacies newe,”

n. active support of an idea or cause etc.; especially the act of pleading or arguing for something

"GOLDBERG: Al Manar -- Al Man adds new meaning to the term advocacy journalism."

support   

defense   

insistence    urging    drumbeat    insistency   

intercession    support   

advocate    upholder    supporter    adoption    enforcement    vindication    activism    promoter    exponent    defence