Let everybody marry with love at heart (7)
I believe the answer is:
allowed
'let' is the definition.
(I've seen this in another clue)
'everybody marry with love at heart' is the wordplay.
'everybody' becomes 'all' (I've seen this before).
'marry' becomes 'wed' (synonyms).
'with love' becomes 'o' (love means zero in tennis. I am not sure about the 'with' bit.).
'at heart' is an insertion indicator.
'all'+'wed'='allwed'
'allwed' enclosing 'o' is 'ALLOWED'.
Can you help me to learn more?
(Other definitions for allowed that I've seen before include "permissible" , "Given the chance" , "Acknowledged" , "Legitimate" , "Permitted and granted" .)