What does the cryptic crossword clue "Saying hello to adder in August perhaps (4,6)" mean?

The wordplay uses a homophone (sounds like). Homophone of “hi” + SUMMER (one who sums or adds) The answer is HIGHSUMMER.

Saying hello to adder in August perhaps (4,6)

Guardian Cryptic #29349 | 13 Down | 2024-04-05 flower