Got to retire delirious once free from obligations (5)

I believe the answer is:

riled

I'm a little stuck... Click here to teach me more about this clue!

'got to' is the definition.
('rile' can be a synonym of 'get to')

'retire delirious once free from obligations' is the wordplay.
'RILED' is hidden back-to-front in amongst the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for riled that I've seen before include "get angry" , "Irritated, provoked" , "Annoyed" , "Made angry" , "Nettled" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.

Connecting...