Has meal in great superstore (4)

I believe the answer is:

eats

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

'has meal' is the definition.
'eats' can be an answer for 'meal' (I've seen this before). I am unsure of the 'has' bit.

'in great superstore' is the wordplay.
'in' indicates a hidden word.
'EATS' is hidden in the letters of 'great superstore'.

Can you help me to learn more?

(Other definitions for eats that I've seen before include "worries" , "Tuck" , "Food (informal)" , "Devours - food" , "Provisions" .)

I've seen this clue in The Sun.

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