Adult rabbit going outside to get drink (7)
I believe the answer is:
alcopop
'drink' is the definition.
(type of alcoholic drink)
'adult rabbit going outside to get' is the wordplay.
I cannot quite understand how this works, but
'adult' could be 'a' (abbreviation) and 'a' is found in the answer.
'get' could be 'cop' (I've seen this before) and 'cop' is present in the answer.
The remaining letters 'lop' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for alcopop that I've seen before include "A mix of alcohol and soft drink" , "Liquor drink for kids" , "Polo cap (anag.)" , "It tastes like a soft drink, but isn't!" , "Soft drink containing spirits" .)