What does the cryptic crossword clue "Most of party bags free for the lady tying the knot (6)" mean?

The wordplay uses a container (one word inside another). RID (synonym="free") in BAL (synonym="BAL") = BRIDAL The answer is BRIDAL.

Most of party bags free for the lady tying the knot (6)

Guardian Cryptic #29092 | 3 Down | 2023-06-09 flower