What does the cryptic crossword clue "Curse lamb and sheep, straying together (9)" mean?

The definition is "Curse". The wordplay uses an anagram. anagram of LAMB + SHEEP, = BLASPHEME; definition: "Curse" The answer is BLASPHEME.

Curse lamb and sheep, straying together (9)

Guardian Cryptic #29164 | 2 Down | 2023-09-01 flower