Gypsy wedding welcomes group of sisters most of all (14)
I believe the answer is:
unconventional
'gypsy' is the definition.
Although both the answer and definition are adjectives, I don't understand how one could define the other.
'wedding welcomes group of sisters most of all' is the wordplay.
'wedding' becomes 'union' (I've seen this in another clue).
'welcomes' means one lot of letters goes inside another (in sense of 'invites in').
'group of sisters' becomes 'convent' (I can't explain this - if you can you should give a lot more credence to this answer).
'most of' means to remove the last letter.
'union' placed around 'convent' is 'unconvention'.
'all' with its final letter removed is 'al'.
'unconvention'+'al'='UNCONVENTIONAL'
Can you help me to learn more?
(Other definitions for unconventional that I've seen before include "Not what you'd expect" , "Free in one's ways" , "Unorthodox" , "Nonconformist" .)