D'Artagnan's home with a couple of rabbits (7)
I believe the answer is:
gascony
'd'artagnan's home' is the definition.
I can't tell whether this defines the answer.
'with a couple of rabbits' is the wordplay.
'a couple of rabbits' means two replacements for 'rabbit'.
'with' means one lot of letters go next to another.
'rabbit' becomes 'gas' (I've seen this before).
'rabbit' becomes 'cony' (synonyms).
'gas' next to 'cony' is 'GASCONY'.
Can you help me to learn more?
(Other definitions for gascony that I've seen before include "somewhere in France" , "province" , "French region" .)