It’s a bar broken in the coffee-maker (7)
I believe the answer is:
barista
'the coffee-maker' is the definition.
(term for a cafe worker)
'it's a bar broken' is the wordplay.
'broken' indicates anagramming the letters.
'its'+'a'+'bar'='itsabar'
'itsabar' anagrammed gives 'BARISTA'.
'in' is the link.
(Other definitions for barista that I've seen before include "coffee-maker" , "Arabist (anag)" , "Starbucks employee" , "Coffee expert" , "Coffee bar server" .)