Godsend (4)
'godsend' is the definition.
(both can mean something very helpful)
This is all the clue.
(Other definitions for boon that I've seen before include "Blessing - sort of companion?" , "Benefaction" , "Benefit and advantage" , "Godsend" , "Something beneficial - a blessing" .)
'godsend' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for blessing that I've seen before include "Grace said before a meal" , "Beneficial thing for which one is grateful" , "Consecration" , "Glibness in benediction" , "Asking God to look favourably on" .)