Service one in apartment, tax already taken care of? (4-4)
I believe the answer is:
duty paid
'tax already taken care of?' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'service one in apartment' is the wordplay.
'service' becomes 'duty' (I've seen this before).
'one' becomes 'i' (Roman numeral).
'in' is an insertion indicator.
'apartment' becomes 'pad' (I've seen this in another clue).
'i' inserted within 'pad' is 'paid'.
'duty'+'paid'='DUTY-PAID'
Can you help me to learn more?
(Other definitions for duty paid that I've seen before include "with no tax outstanding" , "complied with customs" , "Idealised rustic country" .)