What does the cryptic crossword clue "Joining together son with family name from Dallas (6)" mean?

The wordplay uses a charade (building blocks). S (synonym="son") + EWING (synonym="family name from ‘Dallas’") = SEWING The answer is SEWING.

Joining together son with family name from Dallas (6)

Guardian Cryptic #29280 | 19 Down | 2024-01-16 flower