Joker loving to snort line, very keen on a party? (4-8)
I believe the answer is:
card-carrying
'keen on a party?' is the definition.
The definition suggests an adjective which matches the answer.
'joker loving to snort line' is the wordplay.
I cannot really understand how this works, but
'joker' could be 'card' (joker is a type of playing card) and 'card' is located in the answer.
'line' could be 'ry' (abbreviation for railway) and 'ry' is found within the answer.
'loving' could be 'caring' (similar in meaning) and 'caring' is present in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'very' is the link.
Can you help me to learn more?
(Other definitions for card-carrying that I've seen before include "Committed (member)" , "Openly registered as a member of an institution" , "Enrolled as a member" .)