Gather wild lion is excluded from non-violence organisation (7)
I believe the answer is:
convene
'gather wild' is the definition.
'convene' can be an answer for 'gather' (convening is a kind of gathering). I'm unsure of the 'wild' bit.
'lion is excluded from non-violence organisation' is the wordplay.
'is excluded from' suggests deleting specific letters.
'organisation' indicates anagramming the letters.
'non'+'violence'='nonviolence'
'nonviolence' with 'lion' taken out is 'nvoence'.
'nvoence' is an anagram of 'CONVENE'.
Can you help me to learn more?
(Other definitions for convene that I've seen before include "Mass" , "Meet formally" , "Three-legged stand" , "Gather (for meeting)" , "Bring together to meet" .)