What does the cryptic crossword clue "Confused and bothered having mounted debts (9)" mean?

The definition is "debts". The wordplay uses a reversal. RILED (reversal="bothered") + IOUS (synonym="debts") = DELIRIOUS The answer is DELIRIOUS.

Confused and bothered having mounted debts (9)

Independent Cryptic #11837 | 17 Down | 2024-09-17 flower