What does the cryptic crossword clue "Chosen pen, so fork out (6,3)" mean?

The definition is "Chosen". The wordplay uses an anagram. anagram of PEN SO FORK = SPOKENFOR The answer is SPOKENFOR.

Chosen pen, so fork out (6,3)

Guardian Cryptic #29435 | 9 Across | 2024-07-15 flower