What does the cryptic crossword clue "Cut green tree – it might be used for a hedge? (1-4)" mean?

The wordplay uses a charade (building blocks). EC (synonym="EC") + ASH (synonym="ASH") = ECASH The answer is ECASH.

Cut green tree – it might be used for a hedge? (1-4)

Guardian Cryptic #29306 | 8 Across | 2024-02-15 flower