Coffee-maker, it's newly acquired by retired Arab (7)
I believe the answer is:
barista
'coffee-maker' is the definition.
(term for a cafe worker)
'it's newly acquired by retired arab' is the wordplay.
'newly' is an anagram indicator.
'acquired by' means one lot of letters goes inside another.
'retired' says the letters should be written backwards.
'arab' reversed gives 'bara'.
'its' with letters rearranged gives 'ist'.
'ist' put inside 'bara' is 'BARISTA'.
(Other definitions for barista that I've seen before include "Starbucks employee" , "Coffee bar worker" , "person serving drinks" , "Coffee maker?" , "Coffee expert" .)