Clarets served in enemy living quarters (10)
I believe the answer is:
forecastle
'living quarters' is the definition.
(forecastle is a kind of living quarters)
'clarets served in enemy' is the wordplay.
'served' indicates anagramming the letters.
'in' means one lot of letters goes inside another.
'enemy' becomes 'foe' (I've seen this before).
'clarets' is an anagram of 'recastl'.
'recastl' inserted inside 'foe' is 'FORECASTLE'.
(Other definitions for forecastle that I've seen before include "Part of Mary Rose" , "Fo'c'sle in full" , "Forward under-deck part of a ship" , "where the crew is housed" , "Crew's quarters in bow of ship" .)