Crossword Genius

Have a wager with this Mutant Turtle with outsize shell (8)

Ross

I believe the answer is:

roulette

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

'have a wager' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'this mutant turtle with outsize shell' is the wordplay.
'this mutant' indicates an anagram.
'with' is a charade indicator (letters next to each other).
'shell' means to remove the middle letters (only the shell of the word is left).
'outsize' with its middle taken out is 'oe'.
'turtle'+'oe'='turtleoe'
'turtleoe' with letters rearranged gives 'ROULETTE'.

'with' is the link.

Can you help me to learn more?

(Other definitions for roulette that I've seen before include "sort of gambling" , "Table game" , "Wheel of fortune" , "Game of chance with small ball" , "gambling business" .)

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.