What does the cryptic crossword clue "See nag prevail, somehow talking gibberish? (10)" mean?

The wordplay uses an anagram. anagram of NAG (synonym="NAG") + PREVAIL (synonym="PREVAIL") = PALAVERING The answer is PALAVERING.

See nag prevail, somehow talking gibberish? (10)

Guardian Cryptic #29564 | 7 Down | 2024-12-12 flower