What does the cryptic crossword clue "Pee twice, say, when going off — it's that simple (4,5)" mean?

The wordplay uses an anagram. anagram of PEE (synonym="PEE") + SAY (synonym="SAY") + SAY (synonym="SAY") = EASYPEASY The answer is EASYPEASY.

Pee twice, say, when going off — it's that simple (4,5)

Guardian Cryptic #29173 | 11 Across | 2023-09-12 flower