Take out of service cocktail of iced tea attracting tax (10)

'take out of service' is the definition.
(to deactivate is to remove from service)

'cocktail of iced tea attracting tax' is the wordplay.
'cocktail of' is an anagram indicator (a mixture of the letters).
'attracting' means one lot of letters goes inside another (inserted letters are attracted inside).
'tax' becomes 'VAT' (UK Value Added Tax).
'iced'+'tea'='icedtea'
'icedtea' is an anagram of 'deactie'.
'deactie' going around 'vat' is 'DEACTIVATE'.