Let everyone marry without ring (7)
I believe the answer is:
allowed
'let' is the definition.
(I've seen this in another clue)
'everyone marry without ring' is the wordplay.
'everyone' becomes 'all' (all people).
'marry' becomes 'wed' (synonyms).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'ring' becomes 'o' (letter resembling a ring).
'all'+'wed'='allwed'
'allwed' enclosing 'o' is 'ALLOWED'.
(Other definitions for allowed that I've seen before include "Permitted and granted" , "Given permission" , "Acknowledged" , "Owned" , "permissible" .)