What does the cryptic crossword clue "Emotionally-charged writer set to return (6)" mean?

The wordplay uses a reversal. PEN (synonym="=writer") + TUP (synonym="PUT=set, place; “to return” indicates reversal") = PENTUP The answer is PENTUP.

Emotionally-charged writer set to return (6)

Independent Cryptic #11672 | 17 Across | 2024-03-08 flower