Crossword Genius

Tennis accommodated if they go back to purchase particular type of shoe (8)

Ross

I believe the answer is:

moccasin

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

'type of shoe' is the definition.
(I know that moccasin is a type of shoe)

'tennis accommodated if they go back to purchase particular' is the wordplay.
'MOCCASIN' is hidden backwards in amongst the letters.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for moccasin that I've seen before include "going on foot?" , "American Indian shoe" , "Crow's foot perhaps covered in this" , "Footwear" , "Soft shoe - venomous American pit viper" .)

I've seen this clue in The Irish Times.
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