Drink Strega on a regular basis (3)

I believe the answer is:

tea

'drink' is the definition.
(tea is a drink)

'strega on a regular basis' is the wordplay.
'on a regular basis' means one should take alternating letters.
The alternate letters of 'strega' are 'TEA'.

(Other definitions for tea that I've seen before include "Provide a meal" , "Tisane" , "Principally" , "For Japanese ceremony" , "TREE" .)

I've seen this clue in The Times.

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