What does the cryptic crossword clue "Sinner opening House of God (7)" mean?

The wordplay uses a charade (building blocks). CON (synonym="convict, sinner") + VENT (synonym="VENT") = CONVENT The answer is CONVENT.

Sinner opening House of God (7)

Guardian Cryptic #29433 | 8 Down | 2024-07-12 flower