What does the cryptic crossword clue "Adds something against eulogies (11)" mean?

The wordplay uses a charade (building blocks). CON (synonym="CON") + TRIBUTES (synonym="TRIBUTES") = CONTRIBUTES The answer is CONTRIBUTES.

Adds something against eulogies (11)

Guardian Cryptic #29256 | 22 Across | 2023-12-18 flower